\documentclass[12pt,letterpaper]{article}
\usepackage[margin=1.5in]{geometry}
\usepackage[english]{babel}
\usepackage[utf8x]{inputenc}
\usepackage{amsmath}
\usepackage{amssymb}
\usepackage[retainorgcmds]{IEEEtrantools}
\usepackage{graphicx}
\usepackage{tabularx}
\usepackage{subfig}
\usepackage{kpfonts} % for nice fonts
\usepackage{microtype}
\usepackage{booktabs} % for nice tables
\usepackage{bm} % for bold math
\usepackage{listings} % for inserting code
\usepackage{verbatim} % useful for program listings
\usepackage{color}
\usepackage[colorlinks=true]{hyperref}
% use for hypertext
\usepackage[colorinlistoftodos]{todonotes}
\usepackage{natbib}
\begin{document}
%+Title
\title{\textbf{title}\\{\small \textbf{subtitle}}}
\author{Danton Noriega-Goodwin}
\date{}
\maketitle
%-Title
%+Abstract
\begin{abstract}
abstract
\end{abstract}
%-Abstract
\section*{Introduction}
intro \citep{aguiar_consumption_2005}
\section{section}
\subsection{subsection}
\section{section}
\section{conclusion}
\bibliographystyle{apalike}
\bibliography{aguiar}
%remember to use \citep{} for citation
\end{document}
