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<xml><bibliography><APA>Rungthong Kramanon and Rossarin Soottipong Gray. (2015) Differentials in Happiness among the Young Old, the Middle Old and the Very Old in Thailand. &lt;i&gt;Journal of Population and Social Studies&lt;/i&gt;, &lt;i&gt;23&lt;/i&gt;(2), 180-192.</APA><Chicago>Rungthong Kramanon and Rossarin Soottipong Gray. "Differentials in Happiness among the Young Old, the Middle Old and the Very Old in Thailand". Journal of Population and Social Studies  23 (2015):180-192.</Chicago><MLA>Rungthong Kramanon and Rossarin Soottipong Gray. Differentials in Happiness among the Young Old, the Middle Old and the Very Old in Thailand. The Thai Association of the Population and Social Researchers:ม.ป.ท. 2015.</MLA></bibliography></xml>
