APA (7e ed.) Bronvermelding

Durand, J. D. (1974). Historical estimates of world population: An evaluation. Population Studies Center, University of Pennsylvania.

Chicago (17e ed.) Bronvermelding

Durand, John Dana. Historical Estimates of World Population: An Evaluation. Philadelphia: Population Studies Center, University of Pennsylvania, 1974.

MLA (9e ed.) Bronvermelding

Durand, John Dana. Historical Estimates of World Population: An Evaluation. Population Studies Center, University of Pennsylvania, 1974.