%%
%% A DANTE-Edition example
%%
%% Example 17-03-2 on page 280.
%%
%% Copyright (C) 2011 Herbert Voss
%%
%% 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.
%%
%%
%% ====
% Show page(s) 1
%%
\documentclass[]{article}
\pagestyle{empty}
\setlength\textwidth{177.70511pt}
\setlength\parindent{0pt}
\usepackage{pst-tree}
\begin{document}
\psset{tpos=.6}% 60% of the start
\pstree[treemode=R, thistreesep=0.75cm,nrot=:U,
shortput=nab,thislevelsep=3cm,
radius=2pt]{\Tc{3pt}}{%
\pstree[treemode=U, xbbr=20pt]{\Tc{3pt}^{top}}{%
\TC*^{left}
\TC*_{right}}
\TC*\ncput*{centre}
\TC*_{bottom}%
}
\end{document}