APA

Phelps O. W., . (1967). Introduction to labor economics. New York: Mcgraw-Hill.

Chicago

Phelps Orme Wheelock, . 1967. Introduction to labor economics. New York: Mcgraw-Hill.

Harvard

Phelps O. W., . (1967). Introduction to labor economics. New York: Mcgraw-Hill.

MLA

Phelps Orme Wheelock, . Introduction to labor economics. New York: Mcgraw-Hill. 1967.