APA (7th ed.) Zitazioa

WRIGGINS, W. H. (1973). Population, politics and the future of. Columbia U.P.

Chicago Style (17th ed.) Zitazioa

WRIGGINS, W. Howard. Population, Politics and the Future of. New York: Columbia U.P, 1973.

MLA (9th ed.) Zitazioa

WRIGGINS, W. Howard. Population, Politics and the Future of. Columbia U.P, 1973.