Dyfyniad APA

Schultz, T. W. (1980). Investing in people: The economics of population quality. London: University Of California Press.

Dyfyniad Arddull Chicago

Schultz, Theodore W. Investing in People: The Economics of Population Quality. London: University Of California Press, 1980.

Dyfyniad MLA

Schultz, Theodore W. Investing in People: The Economics of Population Quality. London: University Of California Press, 1980.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.