APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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