Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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