APA (7th ed.) Citation

Lewis, M., Clark, W., & Thwaites, R. G. (2001). Original journals of the Lewis & Clark Expedition. Digital Scanning, Inc..

Chicago Style (17th ed.) Citation

Lewis, Meriwether, William Clark, and Reuben Gold Thwaites. Original Journals of the Lewis & Clark Expedition. Scituate, Mass.: Digital Scanning, Inc., 2001.

MLA (9th ed.) Citation

Lewis, Meriwether, et al. Original Journals of the Lewis & Clark Expedition. Digital Scanning, Inc., 2001.