\documentclass{article}
\usepackage{circuitikz}

\begin{document}

\begin{circuitikz}
% Draw the power source
\draw (0,0) to[battery1, l=24<\volt>] (0,4);
% Draw the series resistors
\draw (0,4) to[R, l=6<\ohm>] (4,4) to[R, l=3<\ohm>] (8,4);
% Draw the parallel branch with the 3 ohm resistor
\draw (4,4) to[R, l=3<\ohm>] (4,0);
% Draw the parallel branch with the RL load and the current source
\draw (8,4) to[short] (10,4) to[generic, l=$R_L$] (10,2) to[cI, l=3<\ampere>] (10,0) to[short] (8,0);
% Draw the ground
\draw (0,0) to[short] (10,0) node[ground]{};
% Draw the currents
\draw (2,4) node[above]{$6\,\mathrm{A}$};
\draw (6,4) node[above]{$3\,\mathrm{A}$};
\end{circuitikz}

\end{document}