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

\catcode`\@=11%
\pagestyle{empty}

\begin{document}
\TeXtoEPS

\LARGE
\psset{unit=20mm,arrowscale=1.5,linewidth=1.5pt}
\begin{pspicture}(0,0)(5,7)%\showgrid
  \SpecialCoor
   \rput(1,1){\GM@node[observed=true]{a}} 
   \rput(3,1){\GM@node[observed=true]{b}}   
   \rput(5,1){\GM@node[observed=true]{c}}
   \rput(3,2){\GM@node[observed=false]{d}}
   \rput(2,3){\GM@node[observed=false]{e}}   
   \rput(4,3){\GM@node[observed=false]{f}}
   \rput(1,5){\GM@node[observed=true]{g}}
   \rput(3,5){\GM@node[observed=true]{h}}      
   
   \ncline[arrows=-]{a}{b}
   \ncline[arrows=-]{a}{g}
   \ncline[arrows=-]{b}{c}
   \ncline[arrows=-]{b}{d}
   \ncline[arrows=-]{c}{d}
   \ncline[arrows=-]{c}{f}
   \ncline[arrows=-]{d}{e}                  
   \ncline[arrows=-]{d}{f}
   \ncline[arrows=-]{e}{f}
   \ncline[arrows=-]{e}{g}
   \ncline[arrows=-]{e}{h}
   \ncline[arrows=-]{f}{h}   
   \ncline[arrows=-]{g}{h}

   \rput(0,4.5){\rput[b](0.25,0.4){$V_I$}}   
   \rput(0,2.5){\rput[b](0.25,0.4){$H$}}      
   \rput(0,0.5){\rput[b](0.25,0.4){$V_0$}}   
   
   
\end{pspicture}

\endTeXtoEPS
\end{document}