\begin{tikzpicture}[>=stealth',x = 2cm,y = 2cm,z = 0.77cm]
\draw[->] (.9,159/110,0)-- (-.5,-107/110,0) node[anchor = south east]{$\frac{\partial }{\partial y}$};
\draw[->] (-1.3,.15) -- (1.5,.15) node[anchor = north east]{$\frac{\partial }{\partial x}$};
\draw[->] (.15,-1.3) -- (.15,1.5) node[anchor = north east]{$\frac{\partial }{\partial z}$};
\draw (-.5,-.5) -- (.5,-.5) -- (.5,.5) -- (-.5,.5) -- cycle;
\begin{scope}[shift = {(0,0,1)}]
\draw (-.5,-.5) -- (.5,-.5) -- (.5,.5) -- (-.5,.5) -- cycle;
\end{scope}
\draw (-.5,-.5) -- (-.5,-.5,1) (.5,-.5) -- (.5,-.5,1) (.5,.5) -- (.5,.5,1) (-.5,.5) -- (-.5,.5,1);
\end{tikzpicture}