Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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