APA (7th ed.) Citation

Rolland, R., Paul, E., & Paul, C. (1920). The forerunners. Harcourt, Brace and Howe.

Chicago Style (17th ed.) Citation

Rolland, Romain, Eden Paul, and Cedar Paul. The Forerunners. New York: Harcourt, Brace and Howe, 1920.

MLA (9th ed.) Citation

Rolland, Romain, et al. The Forerunners. Harcourt, Brace and Howe, 1920.