APA (7th ed.) Citation

Wied, G., Boyd, E. A., & Koppel, H. (1923). 2 x 2 = 5: A comedy in four acts. N. L. Brown.

Chicago Style (17th ed.) Citation

Wied, Gustav, Ernest Augustus Boyd, and Holger Koppel. 2 X 2 = 5: A Comedy in Four Acts. New York: N. L. Brown, 1923.

MLA (9th ed.) Citation

Wied, Gustav, et al. 2 X 2 = 5: A Comedy in Four Acts. N. L. Brown, 1923.