Wignaraja, P. e., & Wignaraja, P. a. H. A. (1989). Challenge in South Asia: Development, democracy and regional cooperation. Sage Pubs.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWignaraja, Ponna eds, और Poona and Hussain Akmal Wignaraja. Challenge in South Asia: Development, Democracy and Regional Cooperation. Sage Pubs, 1989.
एमएलए (9वां संस्करण) प्रशस्ति पत्रWignaraja, Ponna eds, और Poona and Hussain Akmal Wignaraja. Challenge in South Asia: Development, Democracy and Regional Cooperation. Sage Pubs, 1989.
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