Cite

September 1-7, 1804, map of "antient fortification" on the bank of the Missouri

MLA

Clark, William, 1770-1838. September 1-7, 1804, map of "antient fortification" on the bank of the Missouri. Box 1, folder 50. 1803-1805. https://collections.library.yale.edu/catalog/2002990.

APA, 6th edition

Clark, William, 1770-1838. (["Box 1, folder 50"])(1803-1805)[September 1-7, 1804, map of "antient fortification" on the bank of the Missouri]. https://collections.library.yale.edu/catalog/2002990.