Multiple subfigures in LaTeX using the subcaption package.

Subcaptions

...
\usepackage{subcaption}
...
\begin{figure}
  \begin{center}
    \begin{subfigure}[t]{0.48\textwidth}
      \centering
      \includegraphics[width=0.38\textwidth]{image-a}
      \caption{Subfigure A caption}
      \label{fig:image-a}
    \end{subfigure}
    \quad
    \begin{subfigure}[t]{0.48\textwidth}
      \centering
      \includegraphics[width=0.38\textwidth]{image-b}
      \caption{Subfigure B caption}
      \label{fig:image-b}
    \end{subfigure}
  \end{center}
  \caption{Figure caption}
  \label{fig:all}
\end{figure}