Cite

September 20-23, 1804, sketch map of the Big Bend of the Missouri

MLA

Clark, William, 1770-1838. September 20-23, 1804, sketch map of the Big Bend of the Missouri. Box 1, folder 55. 1803-1805. https://collections.library.yale.edu/catalog/2002995.

APA, 6th edition

Clark, William, 1770-1838. (["Box 1, folder 55"])(1803-1805)[September 20-23, 1804, sketch map of the Big Bend of the Missouri]. https://collections.library.yale.edu/catalog/2002995.