APA (7th ed.) Citation

Lewis, M., Clark, W., & De Voto, B. (1963). The journals of Lewis and Clark. Houghton, Mifflin.

Chicago Style (17th ed.) Citation

Lewis, Meriwether, William Clark, and Bernard De Voto. The Journals of Lewis and Clark. Boston: Houghton, Mifflin, 1963.

MLA (9th ed.) Citation

Lewis, Meriwether, et al. The Journals of Lewis and Clark. Houghton, Mifflin, 1963.