Medalla, E. M., & Yap, J. T. (2008). Policy issues for the ASEAN Economic Community: The rules of origin. Philippine Institute for Development Studies.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रMedalla, Erlinda M., और Josef T. Yap. Policy Issues for the ASEAN Economic Community: The Rules of Origin. Makati City: Philippine Institute for Development Studies, 2008.
एमएलए (9वां संस्करण) प्रशस्ति पत्रMedalla, Erlinda M., और Josef T. Yap. Policy Issues for the ASEAN Economic Community: The Rules of Origin. Philippine Institute for Development Studies, 2008.
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