\documentclass{report}

\usepackage[utf8x]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[brazilian]{babel}

\begin{document}

\chapter{Intro}

Bibliographies appears in order of citation.
Only cited authors included.

See \cite{goossen}, \cite{leslie2000} as well as \cite{mittel}.

See \cite{goossen,leslie2000,mittel}.

Citation with 3 authors \cite{botelho}.

\bibliographystyle{unsrt}
\bibliography{MyBibliography}

\end{document}
