Cita APA

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

Citación estilo Chicago

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.

Cita MLA

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