APA (7th ed.) Citation

Lewis, M., Clark, W., & Bergon, F. (1989). The journals of Lewis and Clark. Viking.

Chicago Style (17th ed.) Citation

Lewis, Meriwether, William Clark, and Frank Bergon. The Journals of Lewis and Clark. New York, N.Y., U.S.A.: Viking, 1989.

MLA (8th ed.) Citation

Lewis, Meriwether, et al. The Journals of Lewis and Clark. Viking, 1989.