APA (7th ed.) Citation

Hamsun, K., Rawson, G., & Rawson, T. (1924). In the grip of life. Knopf.

Chicago Style (17th ed.) Citation

Hamsun, Knut, Graham Rawson, and Tristan Rawson. In the Grip of Life. New York: Knopf, 1924.

MLA (9th ed.) Citation

Hamsun, Knut, et al. In the Grip of Life. Knopf, 1924.