Latex: Graphs, Subfigures, and Captions

GraphsSubfiguresCaptions.tex

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% Ryan Murphy
%
% This latex shows:
%   (1) How to make graphs using tikz
%   (2) How to align them as subfigures in a grid
%   (3) Use subfigure-level and figure-level captions
%   (4) Include a description
%   (5) Reference the figure
%
% It was put together using more StackExchange and web examples than I can individually acknowledge here, but I appreciate them nonetheless!
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
%
\documentclass{article}
\usepackage[latin9]{inputenc}
\usepackage{subcaption}
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}
\usepackage{amsmath}
\usepackage{amsfonts}
\usepackage{tikz}
\usepackage{tkz-graph}
\usetikzlibrary{positioning}

\begin{document}
	This sentence references Figure~\ref{fig:GraphsAndLabeling}.
	
	\begin{figure}[h]  
		\centering 
		%
		% ~~~~~~~ FIRST SUBFIGURE
		%
		\begin{subfigure}[b]{0.3\linewidth}  
			\subcaptionbox{}{%
				\begin{tikzpicture}[auto,node distance=3cm, thick, main node/.style={circle,draw,font=\sffamily\bfseries}] 
				\node[main node] (3) at (0,0) {};
				\node[main node] (4) at (2,0) {};
				\node[main node] (1) at (0,2) {};
				\node[main node] (2) at (2,2) {};
				\path (1) edge node{} (2);
				\path (2) edge node{} (4);
				\path (4) edge node{} (3);
				\path (3) edge node{} (1);	
				\end{tikzpicture}
			}
		\end{subfigure}%
		\\
		%
		% ~~~~~~~ SECOND SUBFIGURE
		%
		\begin{subfigure}[b]{0.3\linewidth}  
			\subcaptionbox{}{%
				\begin{tikzpicture}[auto,node distance=3cm, thick, main node/.style={circle,draw,font=\sffamily\bfseries}] 
				\node[main node] (3) at (0,0) {};
				\node[main node] (1) at (0,2) {};
				\node[main node] (2) at (2,2) {};
				\path (1) edge node{} (2);
				\path (3) edge node{} (1);
				
				\end{tikzpicture}
			}
		\end{subfigure}
		%
		% ~~~~~~~ THIRD SUBFIGURE
		%
		\begin{subfigure}[b]{0.3\linewidth}  
			\subcaptionbox{}{%
				\begin{tikzpicture}[auto,node distance=3cm, thick, main node/.style={circle,draw,font=\sffamily\bfseries}] 
				\node[main node] (3) at (0,0) {};
				\node[main node] (4) at (2,0) {};
				\node[main node] (1) at (0,2) {};
				\node[main node] (2) at (2,2) {};
				\path (1) edge node{} (2);
				\path (2) edge node{} (4);
				\path (4) edge node{} (3);
				\path (3) edge node{} (1);
				
				\end{tikzpicture}
			}
		\end{subfigure}
		% ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
		%  Properties of the entire figure
		% ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
		\caption{Graphs and Labeling}
		\label{fig:GraphsAndLabeling}
		%
		\medskip
		\raggedright
		\small
		Description of the figure.
	\end{figure}  
		
\end{document}