I'm having a problem sorting the bibliography in alphabetical order, I'm using natbib, here is a code overview:
\usepackage[round]{natbib}
\bibliographystyle{plainnat}
\bibliography{allbiblio/allbiblio}
I'm using TeXnicCenter/MiKTeX distribution, on Windows 7.
\documentclass[a4paper,french]{book}
%\usepackage[T1]{fontenc}
%\usepackage[latin1]{inputenc}
\usepackage[utf8]{inputenc}
\usepackage[francais]{babel}
\usepackage{lipsum}
\usepackage{graphicx}
\usepackage{float}
\usepackage{tabularx,booktabs}
\usepackage{caption}
\usepackage{wrapfig}
\usepackage{multirow}
\usepackage{pdfpages} \usepackage{amsmath,amsfonts,amssymb,amsthm,epsfig,epstopdf,titling,url,array}
\usepackage[round]{natbib}
\begin{document}
\bibliographystyle{plainnat}
\bibliography{allbiblio/allbiblio}
\end{document}
And part of file allbiblio.bib:
@book{c1r1,
title={Should we be using learning styles? What research has to say to practice},
author={Coffield, Frank},
year={2004},
publisher={Learning and Skills Research Centre}
}
@book{c1r2,
title={The Myers-Briggs Type Indicator: Form G},
author={Briggs, Katharine Cook and Myers, Isabel Briggs},
year={1977},
publisher={Consulting Psychologists Press}
}
@book{c1r3,
title={Experiential learning: Experience as the source of learning and development},
author={Kolb, David A},
year={2014},
publisher={FT press}
}

natbibpackage with theplainnatstyle but I guess that the entries are sorted alphabetically by default. It would be easier to help you if you gave us a working example. Which commands did you use to compile your document? – Thorsten Mar 31 '16 at 11:16natbibpackage offers the bib stylesplainnat,unsrtnat, andabbrvnat. They provide the exact same formatting of bib entries as the venerable stylesplain,unsrt, andabbrvdo. Relative to the "original" styles, the styles of thenatbibpackage offer two important advantages: (a) one can do authoryear-style and superscript-style citation callouts, and not just numeric-style citation call-outs; and (b) the style files recognize and process additional fields such asurl,doi,isbn, andissn. – Mico Sep 03 '16 at 19:13