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<xml><bibliography><APA>Udomsak Seenprachawong. (2006) A Study on Willingness to Pay for Packaging Fee. &lt;i&gt;Development Economic Review&lt;/i&gt;, &lt;i&gt;1&lt;/i&gt;(1), 1.</APA><Chicago>Udomsak Seenprachawong. "A Study on Willingness to Pay for Packaging Fee". Development Economic Review  1 (2006):1.</Chicago><MLA>Udomsak Seenprachawong. A Study on Willingness to Pay for Packaging Fee. School of Development Economic:ม.ป.ท. 2006.</MLA></bibliography></xml>
