I want to mention a theorem from a paper. I am using the \cite reference style. I used the following code(WinEdt Latex):

We have following lemma $\cite{singh1}$ to find $**************************$.

And it is showing in following manner:

enter image description here.

I want the Lemma to start as:

Lemma 1.2 [XYZ, 17]

How to write in this format?

My tex code and output:

\usepackage[top=1in, bottom=1in, left=1in, right=1in]{geometry}
\titleformat*{\section}{\large\bfseries}% change font of section headings
\usepackage{lipsum} % for filler text
  \par\topsep6pt plus6pt
  \item[\hskip\labelsep\it Proof.]\ignorespaces}
\def\enddemo{\qed \endtrivlist}
\expandafter\let\csname enddemo*\endcsname=\enddemo
\newcommand{\R} {\mbox {$ I\!\!R $}}
\lfoot{\footnotesize Date :  {\ddmmyyyydate\today}}
\rfoot{ \footnotesize \thepage}
\title{Title of The Paper}
The content of the abstract.
$~~${\bf Keywords}: 
\noindent Also, we have following lemma \cite{singh1} to .............
\begin{Lemma} \label{distconormal} \cite{singh1} Lemma Statement
\bibitem{singh1} P. Singh , Article Title, Journal name.

enter image description here

  • 4
    This will depend on the way you produce your lemmas (amsthm, theorem, thmtools ...) and citations (cite, natbib, biblatex, ...). Please show us an MWE/MWEB. – moewe Jun 24 '18 at 12:31
  • 3
    BTW: I don't see any reason to use \cite in math mode in your example We have following lemma \cite{singh1} to works just as well. – moewe Jun 24 '18 at 12:39
  • 2
    You can mark up your code by indenting it by four spaces or by clicking the {} button. Please do not mark it as a quote, that makes it much harder to read (and quite hard to salvage in an edit). Since your MWE shows that you do not use biblatex I have removed that tag. – moewe Jun 24 '18 at 13:00
  • @moewe This is the new thing that I learned today. Thanks a lot. – monalisa Jun 24 '18 at 13:06
  • 1
    You should throw out stuff from your preamble that you don't use. Do you really need all packages you load (epsfig, setspace?; amssymb loads amsfonts; mathtools loads amsmath). Macros for \begin{...}/\end{....} like \bea, \eea and friends are also not recommended and eqnarray should be avoided. \newcommand{\R} {\mbox {$ I\!\!R $}} looks quite hacky to me, I normally use \mathbb{R}, but that's probably a matter of taste. – moewe Jun 24 '18 at 13:26

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