Cita APA

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

Citación estilo Chicago

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

Cita MLA

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