APA način citiranja (7. izdanje)

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

Čikaški stil citiranja (17. izdanje)

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 način citiranja (9. izdanje)

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