\documentclass[a4paper,11pt]{article}
\usepackage[left=3cm,top=3cm,right=2cm]{geometry}
\usepackage[utf8]{inputenc}
%\usepackage[T1]{fontenc}
% much prettier Computer Modern fonts than with T1 fontenc
\usepackage{ae,aecompl}
\usepackage[T1]{fontenc}
% headers and footers
\usepackage{fancyhdr}
\fancyfoot{} % Delete current footer settings
\fancyhead{}
\fancyhead[R]{\bfseries\thepage}
\fancyhead[L]{\bfseries\sectionmark}
\renewcommand{\headrulewidth}{0.3pt}
\usepackage[pdftex]{graphicx}
\usepackage{natbib}
\bibliographystyle{agsm}
% To include ToC and Bibliography in the Table of Contents
\usepackage{tocbibind}
\usepackage[colorlinks]{hyperref}
\hypersetup{colorlinks=true,linkcolor=blue,anchorcolor=blue,citecolor=blue,filecolor=blue,urlcolor=green}
% Author and title information
\author{me}
\title{the title}
\date{11.5.07}
%%%%%%%%%%%%%%%%%%%%%%% Document starts here %%%%%%%%%%%%%%%%%%%%%%%%%
\pagestyle{plain}
\begin{document}
\maketitle
\pagestyle{fancy}
\section{Preamble}
Some text goes here.
\section{First}
Normally the section headings show up in the table of contents exactly
as they are entered in the text. Sometimes this is not possible, because the
heading is too long to fit into the table of contents. The entry for the table
of contents can then be specified as an optional argument in front of the
actual heading. \cite[]{Petersburg06}
\bibliography{mybib}
\end{document}