APA (7th ed.) Citation

Phelps, O. W. (1978). Introduction to labor economics (4.ed.). Krieger.

Chicago Style (17th ed.) Citation

Phelps, Orme W. Introduction to Labor Economics. 4.ed. New York: Krieger, 1978.

MLA (9th ed.) Citation

Phelps, Orme W. Introduction to Labor Economics. 4.ed. Krieger, 1978.