APA (7e ed.) Bronvermelding

Schultz, T. W. (1981). Investing in people: The economics of population quality. University of California.

Chicago (17e ed.) Bronvermelding

Schultz, Theodore W. Investing in People: The Economics of Population Quality. London: University of California, 1981.

MLA (9e ed.) Bronvermelding

Schultz, Theodore W. Investing in People: The Economics of Population Quality. University of California, 1981.