APA (7th ed.) Citation

Cummins, E. E. (1935). The labor problem in the United States (2. ed.). Nostrand.

Chicago Style (17th ed.) Citation

Cummins, Earl E. The Labor Problem in the United States. 2. ed. New York: Nostrand, 1935.

MLA (9th ed.) Citation

Cummins, Earl E. The Labor Problem in the United States. 2. ed. Nostrand, 1935.