Here is an example using IEEE bibliography style. Note that JabRef is just a GUI to maintain/add/remove adjust your bibliography entries. It doesn't have an effect on the document creation mechanism.
\documentclass{book}
% === Remove this up to the marked position to use your own bib file
\usepackage{filecontents} % For a dummy bibfile creation
\begin{filecontents*}{mybibfile.bib}
@ARTICLE{authora,
author = {A. Aaaaa},
title = {Some article},
journal = {Journal of Dummy Article Names},
year = {2012},
volume = {99},
pages = {1-5}
}
@ARTICLE{authorb,
author = {B. Baaaa},
title = {Another article},
journal = {Journal of Dummy Article Names},
year = {2012},
volume = {99},
pages = {6-10}
}
\end{filecontents*}
% =========== Up to here
\begin{document}
We cite papers \cite{authora,authorb}.
\bibliographystyle{ieeetran}
\bibliography{mybibfile} % Replace this with your original bib file
\end{document}