\documentclass[]{article} 

\usepackage{footbib}

\begin{document}

\title{test}
\author{A. D. Cimmarusti}

	\maketitle

\section{test}

Previous work~\footcite{lamport94}


\begin{thebibliography}{9}

\bibitem{lamport94}
  Leslie Lamport,
  \emph{\LaTeX: A Document Preparation System}.
  Addison Wesley, Massachusetts,
  2nd Edition,
  1994.

\end{thebibliography}

\end{document}

