[Tex/LaTex] How to print bibliography using natbib

bibliographiesnatbib

I am new to Latex but I want to write my master's thesis using it.
The official requirement for reference style is the one used in Operations Research published by INFORMS.
So I found a template of it on ShareLatex and copied the code regarding natbib to my own tex file.

I can't figure out why the reference list isn't printed using the natbib package.
Can someone please help?
I have already spent four hours googling this and still no answer.

I use TeXStudio and when I run the file, it tells me that there are undefined citations. Basically, none of my citations show in the text. And there's no reference section either.

My tex file looks like this:

\documentclass{report}
\usepackage[utf8]{inputenc}
\usepackage{natbib}
\bibliographystyle{ormsy080}
 \bibpunct[, ]{(}{)}{,}{a}{}{,}%
 \def\bibfont{\small}%
 \def\bibsep{\smallskipamount}%
 \def\bibhang{24pt}%
 \def\newblock{\ }%
 \def\BIBand{and}%}

\begin{document}
\citet{Chenetal2016}
\citep{Fildesetal2009}
\bibliography{AA}

\end{document}

I have a bib file saved in the same folder as my tex file and it's named AA. Here are the two bib entries I was trying to cite. 

@Article{Chenetal2016,
  author    = {Daniel L. Chen and Martin Schonger and Chris Wickens},
  title     = {{oTree}{\textemdash}An open-source platform},
  journal   = {Journal of Behavioral and Experimental Finance},
  year      = {2016},
  volume    = {9},
  month     = {mar},
  pages     = {88--97},
  doi       = {10.1016/j.jbef.2015.12.001},
  abstract  = {[B]},
  keywords  = {rank4},
  publisher = {Elsevier {BV}},
}

and

@Article{Fildesetal2009,
  author    = {R. Fildes and P. Goodwin and M. Lawrence and K. Nikolopoulos},
  title     = {Effective forecasting and judgmental adjustments},
  journal   = {International Journal of Forecasting},
  year      = {2009},
  volume    = {25},
  number    = {1},
  month     = {jan},
  pages     = {3--23},
  doi       = {10.1016/j.ijforecast.2008.11.010},
  abstract  = {[A]},
  publisher = {Elsevier {BV}},
}

Best Answer

My bibliography now prints out as wanted after I did the following:

  1. download the bst file specified in \bibliographystyle{}
  2. make sure the name of the bst file corresponds to what is inside the \bibliographystyle{}
  3. using TeXStudio, simply click on compile.
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