\documentclass{article}
\usepackage{com.braju.graphicalmodels}

\catcode`\@=11%

\pagestyle{empty}

\begin{document}
\TeXtoEPS

\LARGE
\psset{unit=10mm,arrowscale=1.5,linewidth=1.5pt}
\begin{pspicture}(-3,-3)(15,10)%\showgrid
  \SpecialCoor


  \rput(0.5,2.5){\GM@plate{5}{5.5}{N}}
  \rput(0,-1){\GM@plate{2}{2.5}{m}}
  \rput(4,-1){\GM@plate{2}{2.5}{l}}
  



   \rput(1,0){\GM@node[observed=false]{muj}} \GM@label[angle=100]{muj}{$\mu_j$}
   \rput(5,0){\GM@node[observed=false]{sigmak}}   \GM@label[angle=80]{sigmak}{$\sigma_k$}
   \rput(3,4){\GM@node[observed=true]{xn}}    \GM@label[angle=-180]{xn}{$x_n$}
   \rput(2,7){\GM@node[observed=false]{taun}}   \GM@label[angle=-180]{taun}{$J_n$}
   \rput(4,7){\GM@node[observed=false]{kn}}   \GM@label[angle=0]{kn}{$K_n$}
   \rput(2,9){\GM@node[observed=false]{p}}     \GM@label[angle=90]{p}{$p$}
   \rput(4,9){\GM@node[observed=false]{q}}     \GM@label[angle=90]{q}{$q$}   


   \ncline[arrows=->]{muj}{xn}
   \ncline[arrows=->]{sigmak}{xn}
   \ncline[arrows=->]{taun}{xn}
   \ncline[arrows=->]{kn}{xn}
   \ncline[arrows=->]{p}{taun}
   \ncline[arrows=->]{q}{kn}   


\end{pspicture}

\endTeXtoEPS
\end{document}