APA (7e ed.) Bronvermelding

Witherick, M. E. (1990). Population geography. Longman.

Chicago (17e ed.) Bronvermelding

Witherick, M. E. Population Geography. London: Longman, 1990.

MLA (9e ed.) Bronvermelding

Witherick, M. E. Population Geography. Longman, 1990.