diff --git a/img/vtp/implementing-vtp.jpg b/img/vtp/implementing-vtp.jpg
new file mode 100644
index 0000000..c703f5c
Binary files /dev/null and b/img/vtp/implementing-vtp.jpg differ
diff --git a/main.tex b/main.tex
index 0f21a13..4d81c9e 100644
--- a/main.tex
+++ b/main.tex
@@ -12,6 +12,7 @@
 \usepackage{float}
 \usepackage[english]{babel}
 \usepackage{fancyhdr}
+\usepackage{wrapfig}
 
 % Define color
 \definecolor{codegreen}{rgb}{0,0.6,0}
@@ -42,24 +43,24 @@
 
 % Path where images are located relative
 % to the file main.tex
-\graphicspath{{img/}}
+\graphicspath{{img/}{figures/}}
 
 % Custom commands
-% Usage: \pic{ [<pct-of-testwidt>] }{ <path-to-file> }
+% Usage: \pic[<pct-of-testwidt>]{<path-to-file>}
 \newcommand{\pic}[2][25]{
-    \begin{center}
-        \transparent{0.4}
-        \includegraphics[width=0.#1\textwidth]{#2}
-    \end{center}
+\begin{center}
+    \transparent{0.4}
+    \includegraphics[width=0.#1\textwidth]{#2}
+\end{center}
 }
-% Usage: \fig{ [<caption>] }{ <label> }{ <path-to-file> }
-\newcommand{\fig}[3][]{
-    \begin{figure}[h]
-        \centering
-        \includegraphics[width=0.25\textwidth]{#3}
-        \caption{#1}
-        \label{fig:#2}
-    \end{figure}
+% Usage: \rfig{<path-to-file>}{<label>}
+\newcommand{\rfig}[2]{
+\begin{wrapfigure}{r}{0.60\textwidth}
+    \begin{center}
+        \includegraphics[width=0.58\textwidth]{#1}
+    \end{center}
+    \caption{#2}
+\end{wrapfigure}
 }
 
 % In which order to look after images in
@@ -161,8 +162,9 @@
 
 \section{VLAN}
 
-%\subsection{BPDU}
-%\subsection{}
+\subsection{VTP}
+\rfig{vtp/implementing-vtp}{VTP}\cite{vtpchap4}
+
 
 \section{Spanning Tree}
 
@@ -170,7 +172,6 @@
 \subsection{PVST}
 \subsection{RPVST+}
 \subsection{MTP}
-\subsection{VTP}
 
 
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
@@ -183,6 +184,15 @@
 
 \section{BGP}
 
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%                                                    %
+% BEGIN REFERENCES                                   %
+%                                                    %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+\bibliographystyle{unsrt}
+\bibliography{unsrt}
+
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 %                                                    %
 % END DOCUMENT                                       %
diff --git a/references.bib b/references.bib
new file mode 100644
index 0000000..e69de29
diff --git a/unsrt.bib b/unsrt.bib
new file mode 100644
index 0000000..7291831
--- /dev/null
+++ b/unsrt.bib
@@ -0,0 +1,19 @@
+@online{vtpchap4,
+    ALTauthor = {Hector Camba Lainez},
+    ALTeditor = {editor},
+    title = {Cap4 implementing vtp},
+    date = {Jun 25, 2010},
+    url = {https://www.slideshare.net/lucky0679/cap4-implementing-vtp},
+    OPTsubtitle = {subtitle},
+    OPTtitleaddon = {titleaddon},
+    OPTlanguage = {language},
+    OPTversion = {version},
+    OPTnote = {note},
+    OPTorganization = {organization},
+    OPTdate = {22},
+    OPTmonth = {05},
+    OPTyear = {2017},
+    OPTaddendum = {addendum},
+    OPTpubstate = {pubstate},
+    OPTurldate = {2017-05-22},
+}