Mein LaTeX-Forum

\documentclass{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage[ngerman]{babel}

\usepackage[style=authoryear, backend=biber,
]{biblatex}

\usepackage{filecontents}
\begin{filecontents*}{\jobname.bib}
@incollection{test2019,
Author    = {Max Mustermann},
Booktitle = {Testbuch},
Editor    = {Maria Musterfrau and Peter Pan and Karl-Heinz Müller},
Title     = {Testtitel},
Year      = {2019},
}
@incollection{test2018,
   Author    = {Max Mustermann},
   Booktitle = {Testbuch2},
   Editor    = {Maria Musterfrau and Karl-Heinz Müller},
   Title     = {Testtitel2},
   Year      = {2018},
}  
\end{filecontents*}
\addbibresource{\jobname.bib}


\begin{document}
test\footcite{test2019} test\footcite{test2018}
\printbibliography
\end{document}