APA (7th ed.) Citation

Lang, K., & Lang, G. (1961). Collective dynamics. Crowell.

Chicago Style (17th ed.) Citation

Lang, Kurt, and Gladys Lang. Collective Dynamics. New York: Crowell, 1961.

MLA (9th ed.) Citation

Lang, Kurt, and Gladys Lang. Collective Dynamics. Crowell, 1961.