%% 
%%  The LaTeX Graphics Companion, 2ed (first printing May 2007)
%% 
%%  Example 6-3-1 on page 366.
%% 
%%  Copyright (C) 2007 Michel Goossens, Frank Mittelbach, Denis Roegel, Sebastian Rahtz, Herbert Vo\ss 
%% 
%%  It may be distributed and/or modified under the conditions
%%  of the LaTeX Project Public License, either version 1.3
%%  of this license or (at your option) any later version.
%% 
%%  See http://www.latex-project.org/lppl.txt for details.
%% 

\documentclass{ttctexa}
\pagestyle{empty}
\setcounter{page}{6}
\setlength\textwidth{159.83385pt}
\StartShownPreambleCommands
\usepackage{pstricks,pst-tree}
\StopShownPreambleCommands
\begin{document}
\psset{showbbox=true}%
\rule{1em}{0.5pt}%
\pstree[radius=3pt]{\Toval{pstree}}{
  \TC\TC\TC}%   the successors
\rule{1em}{0.5pt}%
\begin{psTree}[radius=3pt]{\Toval{psTree}}
   \TC*\TC\TC*
\end{psTree}\rule{1em}{0.5pt}
\end{document}