Citazione Stile APA (7a Edizione)

Demeny, P. G. (1981). The North-South income gap: A demographic perspective. Population Council.

Citazione stile Chigago Style (17a edizione)

Demeny, Paul George. The North-South Income Gap: A Demographic Perspective. New York: Population Council, 1981.

Citatione MLA (9a ed.)

Demeny, Paul George. The North-South Income Gap: A Demographic Perspective. Population Council, 1981.