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Sorry, I forgot to put an example of the TEX document:

\documentclass[twoside,12pt]{article}

\begin{document}

blablabla \cite{valle1}

\bibliographystyle{unsrt}
\bibliography{references}
\end{document}

Dear all,

I am using latex with TeXniCenter (Windows). I am trying to modify the BST. file unsrt.bst to get the reference style exactly as I need.

this is my BST so far:
ENTRY
{ address
author
booktitle
chapter
edition
editor
howpublished
institution
journal
year
key
month
note ...