Citazione APA

Cohen, J. G., & Scarlet, W. (1931). Modern pioneers. Allyn and Bacon.

Stile di citazione Chicago

Cohen, Joseph George, e Will Scarlet. Modern Pioneers. Boston : New York [etc.]: Allyn and Bacon, 1931.

Citazione MLA

Cohen, Joseph George, e Will Scarlet. Modern Pioneers. Allyn and Bacon, 1931.