Simbulan, R. G. (2015). The world is a classroom: Reflections of a fellow traveler. Center for People Empowerment in Governance.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSimbulan, Roland G. The World Is a Classroom: Reflections of a Fellow Traveler. Diliman, Quezon City, Philippines: Center for People Empowerment in Governance, 2015.
एमएलए (9वां संस्करण) प्रशस्ति पत्रSimbulan, Roland G. The World Is a Classroom: Reflections of a Fellow Traveler. Center for People Empowerment in Governance, 2015.
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