Chawla, M., Betcherman, G., & Banerji, A. (2007). From red to gray: The "third transition" of aging populations in Eastern Europe and the former Soviet Union. World Bank.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিChawla, Mukesh, Gordon Betcherman, এবং Arup Banerji. From Red to Gray: The "Third Transition" of Aging Populations in Eastern Europe and the Former Soviet Union. Washington D.C.: World Bank, 2007.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিChawla, Mukesh, et al. From Red to Gray: The "Third Transition" of Aging Populations in Eastern Europe and the Former Soviet Union. World Bank, 2007.
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