I am using this code:
\documentclass[12pt,peerreview,draftcls,onecolumn]{IEEEtran} %
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage{natbib}
\usepackage{graphicx}
\usepackage[tight,footnotesize]{subfigure}
\usepackage{algorithmic}
\usepackage{algorithm}
\begin{document}
...
... policies \cite{1Engelman02FCC} ...
...
\begin{thebibliography}{10}
\bibitem{1Engelman02FCC} Engelman, R. (2011) `A survey of common control channel design in cognitive radio networks', {\it Elsevier Physical Communication}, Vol. 4, pp. 26-–39.
...
\end{thebibliography}
\end{document}
and this is the result:
It displays references inside the parentheses but I want to display them inside the braces [ ].

subfigurepackage is considered deprecated. Use the subfig package instead. – Mico Nov 20 '16 at 07:27\usepackage[numbers]{natbib}– Elad Den Nov 20 '16 at 07:29IEEEtrandocument class; and (c) one will get specious warnings becausenatbibis looking for a\bibliographystyleinstruction. These warnings can, admittedly, be ignored in the present case; nevertheless, it's probably a good idea to point this out explicitly. – Mico Nov 20 '16 at 07:36