APA (7th ed.) Citation

Hoffmann, R. W., & Plutchik, R. (1959). Small-group discussion in orientation and teaching. Putnam.

Chicago Style (17th ed.) Citation

Hoffmann, Randall W., and Robert Plutchik. Small-group Discussion in Orientation and Teaching. New York: Putnam, 1959.

MLA (9th ed.) Citation

Hoffmann, Randall W., and Robert Plutchik. Small-group Discussion in Orientation and Teaching. Putnam, 1959.