APA (7th ed.) Citation

Dunlop, J. T., & Galenson, W. (1978). Labor in the twentieth century. Academic Press.

Chicago Style (17th ed.) Citation

Dunlop, John T., and Walter Galenson. Labor in the Twentieth Century. New York: Academic Press, 1978.

MLA (9th ed.) Citation

Dunlop, John T., and Walter Galenson. Labor in the Twentieth Century. Academic Press, 1978.