<?xml version="1.0" encoding="UTF-8"?>
<xml><bibliography><APA>Piriya Polpirul. (2008) From Classical Trade Theory to the Priority Ranking of Bilateral Free Trade Area. &lt;i&gt;NIDA Development Journal&lt;/i&gt;, &lt;i&gt;48&lt;/i&gt;(3), 1-18.</APA><Chicago>Piriya Polpirul. "From Classical Trade Theory to the Priority Ranking of Bilateral Free Trade Area". NIDA Development Journal  48 (2008):1-18.</Chicago><MLA>Piriya Polpirul. From Classical Trade Theory to the Priority Ranking of Bilateral Free Trade Area. National Institute of Development Administration:ม.ป.ท. 2008.</MLA></bibliography></xml>
