 \documentclass[12pt]{book}
 \usepackage{amsmath,amssymb,xepersian} 
\renewcommand{\baselinestretch}{1.9} 
\settextfont[Scale=1.1]{B Nazanin}
\setlatintextfont{Times New Roman} 
\setdigitfont{Yas}
\begin{document}
فقط برای‎\cite{dickson1901linear}‎ سوال
فقط برای‎\cite{derafshe1387linear}‎ سوال
\bibliographystyle{plain-fa}
\renewcommand{\bibname}{\rl{{مراجع}\hfill}}

\bibliography{myref}
\end{document}