United Nations. Department of International Economic and Social Affairs. Population Division & United Nations. Department of Economic and Social Affairs. Population Division. (1998). User's guide to the population, resources, environment and development databank (Pred Bank, version 2.1). United Nations.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)United Nations. Department of International Economic and Social Affairs. Population Division và United Nations. Department of Economic and Social Affairs. Population Division. User's Guide to the Population, Resources, Environment and Development Databank (Pred Bank, Version 2.1). New York: United Nations, 1998.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)United Nations. Department of International Economic and Social Affairs. Population Division và United Nations. Department of Economic and Social Affairs. Population Division. User's Guide to the Population, Resources, Environment and Development Databank (Pred Bank, Version 2.1). United Nations, 1998.