APA (7th ed.) Citation
Lewis, M., Clark, W., & Thwaites, R. G. (2001). Atlas accompanying the original journals of the Lewis and Clark expedition, 1804-1806, being facsimile reproductions of maps chiefly by William Clark ... Now for the first time published, from the original manuscripts. Digital Scanning.
Chicago Style (17th ed.) Citation
Lewis, Meriwether, William Clark, and Reuben Gold Thwaites. Atlas Accompanying the Original Journals of the Lewis and Clark Expedition, 1804-1806, Being Facsimile Reproductions of Maps Chiefly by William Clark ... Now for the First Time Published, from the Original Manuscripts. Scituate, Mass.: Digital Scanning, 2001.
MLA (9th ed.) Citation
Lewis, Meriwether, et al. Atlas Accompanying the Original Journals of the Lewis and Clark Expedition, 1804-1806, Being Facsimile Reproductions of Maps Chiefly by William Clark ... Now for the First Time Published, from the Original Manuscripts. Digital Scanning, 2001.
Warning: These citations may not always be 100% accurate.