APA (7. basım) Alıntı

Perera, P. (1989). Emerging issues of population aging in Sri Lanka. Economic and Social Commission for Asia and the Pacific, United Nations.

Chicago Style (17. basım) Atıf

Perera, P.D.A. Emerging Issues of Population Aging in Sri Lanka. Bangkok: Economic and Social Commission for Asia and the Pacific, United Nations, 1989.

MLA (9th ed.) Atıf

Perera, P.D.A. Emerging Issues of Population Aging in Sri Lanka. Economic and Social Commission for Asia and the Pacific, United Nations, 1989.