Cite

Route about April 20-30, 1805, and Lewis's route about August 7-10, 1806

MLA

Clark, William, 1770-1838, Lewis, Meriwether, 1774-180. Route about April 20-30, 1805, and Lewis's route about August 7-10, 1806. Box 1 | Folder 22r. 1806?. https://collections.library.yale.edu/catalog/2002465.

APA, 6th edition

Clark, William, 1770-1838, & Lewis, Meriwether, 1774-180. (["Box 1 | Folder 22r"])(1806?)[Route about April 20-30, 1805, and Lewis's route about August 7-10, 1806]. https://collections.library.yale.edu/catalog/2002465.