\documentclass{article}
\usepackage[pdftex,active,tightpage]{preview}
\setlength\PreviewBorder{2mm}
 
\usepackage{tikz}
\usetikzlibrary{shapes.multipart, calc} 

\begin{document}
\begin{preview}
\begin{tikzpicture}
    \tikzstyle{bplus}=[rectangle split, rectangle split horizontal,rectangle split ignore empty parts,draw, fill=white]
    \tikzstyle{every node}=[bplus]
    \tikzstyle{level 1}=[sibling distance=60mm]
    \tikzstyle{level 2}=[sibling distance=15mm]

    \node {11} [->]
      child {node {3 \nodepart{two} 7}
        child {node {0 \nodepart{two} 1 \nodepart{three} 2}}
        child {node {4 \nodepart{two} 5 \nodepart{three} 6}}
        child {node {8 \nodepart{two} 9 \nodepart{three} 10}}    
      } 
      child {node {15 \nodepart{two} 18}
        child[sibling distance=20mm] {node {12 \nodepart{two} 13 \nodepart{three} 14}}
        child {node {16 \nodepart{two} 17}}
        child {node {19}}
      };
\end{tikzpicture}
\end{preview}
\end{document}
