biblatex APA風格的修改

Question

對於我的期末論文，我需要使用 APA 風格的稍微修改版本。在詳細介紹之前，我想向您展示一個 MWE：

\documentclass[12pt]{scrreprt} 
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc} 
\usepackage[ngerman]{babel}
\usepackage{csquotes} 
\usepackage[%
backend=biber,
style=authoryear-comp,
bibstyle=apa]{biblatex}   
\DeclareLanguageMapping{ngerman}{ngerman-apa}
\DefineBibliographyStrings{ngerman}{andothers={et\ \addabbrvspace al\adddot}}

\usepackage{filecontents} 
\begin{filecontents}{literatur.bib} 
@book{XYZ2010, 
 author = {Andrew Alphason and Bertram Betason and Christian Gammason}, 
 year = {2010}, 
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart}
}
@book{XYZ2011,
 editor = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2011},
 title = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
@incollection{XYZ2012,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason},
 editor = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2012},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart}, 
}
@incollection{XYZ2013,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason},
 editor = {Andrew Alphason and Bertram Betason},
 year = {2013},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart}, 
}
@book{XYZ2014a, 
 author = {Phil Phison and Bertram Betason}, 
 year = {2014}, 
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart},
} 
@book{XYZ2014b, 
 author = {{Fictional Institution}}, 
 year = {2014}, 
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart},
}
@incollection{XYZ2014c,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason and Ezra Epsilonson},
 editor = {Andrew Alphason and Bertram Betason},
 year = {2014},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
\end{filecontents} 
\bibliography{literatur} 

\begin{document} 
\parencite{XYZ2010,XYZ2011,XYZ2012,XYZ2013,XYZ2014a,XYZ2014b,XYZ2014c}
\printbibliography 
\end{document}

我需要改變的是：

1. 若參考書目條目的初始位置有 2 位和 2 位以上作者/編輯，則「&」前應有一個逗號。
2. 如果編輯者出現在後面，如 MWE 中的第 3 和第 4 條，則「&」之前只應有一個逗號，以防編輯者數量超過 2 個。這裡只有 2 位編輯，沒有逗號。別問我為什麼，我就是要這麼做！
3. APA 通常在作者/編輯/機構和年份之間列印句點（在括號中）。我不允許在那裡插入句號。我怎麼刪除它？在這個範例中，不允許在條目 2 中使用「(Hrsg.)」之後的句點。

我已經插入了輸出的圖像。我用紅色表示錯誤，用綠色表示正確。

編輯資訊：我添加了更多範例來演示我正在討論的問題。

Answer 1

給你;

\documentclass[12pt]{scrreprt}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}
\usepackage{csquotes}
\usepackage[%
backend=biber,
style=authoryear-comp,
bibstyle=apa]{biblatex}
\DeclareLanguageMapping{ngerman}{ngerman-apa}
\DefineBibliographyStrings{ngerman}{andothers={et\ \addabbrvspace al\adddot}}

\usepackage{filecontents}
\begin{filecontents}{literatur.bib}
@book{XYZ2010,
 author = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2010},
 title = {{Ein Testbuch}},
 publisher = {Springer},
 address = {Stuttgart}
}
@book{XYZ2011,
 editor = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2011},
 title = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
@incollection{XYZ2012,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason},
 editor = {Andrew Alphason and Bertram Betason and Christian Gammason},
 year = {2012},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
@incollection{XYZ2013,
 title = {{Meine kleine Testdatei}},
 author = {Dirk Deltason},
 editor = {Andrew Alphason and Bertram Betason},
 year = {2013},
 booktitle = {{Ein Sammelwerk}},
 publisher = {Springer},
 address = {Stuttgart},
}
\end{filecontents}

\addbibresource{literatur.bib}

\usepackage{xpatch}

 \DefineBibliographyExtras{ngerman}{\def\finalandcomma{\addcomma}}

\xpatchbibmacro{editorinauthpos}{%
       \clearname{editor}%
       \setunit{\adddot\addspace}%
}{%
       \clearname{editor}%
       \setunit{\addspace}%
}{}{}

\begin{document}

\parencite{XYZ2010,XYZ2011,XYZ2012,XYZ2013}
\printbibliography

\end{document}