Mein LaTeX-Forum

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

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

\addbibresource{biblatex-examples.bib}


\begin{document}
Lorem\autocite{sigfridsson} ipsum\autocite{worman}
dolor\autocite{nussbaum} sit\autocite{geer}
amet\autocite{sigfridsson}.
\printbibliography
\end{document}