\documentclass[12pt,a4paper]{article}
\usepackage{marginnote,widemargin}
\def\a{Bla bla bla bla, bla bla bla bla, bla bla bla bla.}
\def\b{\a\ \a\ \a}
\begin{document}

\b
\topmarginnote{\b}%
\botmarginnote{\b}%
\footnote{\b}%

\b
\footnote{\b}%
\topmarginnote{\b}%
\botmarginnote{\b}%

\end{document}

%%% Local Variables: 
%%% mode: latex
%%% TeX-master: t
%%% End: