View of the Rocky Mountains on the platte 50 miles from their base
MLA
Kearny, Francis, 1785-1837, Seymour, Samuel, fl. 1797-1822. View of the Rocky Mountains on the platte 50 miles from their base. Atlas. https://collections.library.yale.edu/catalog/2000896.
APA, 6th edition
Kearny, Francis, 1785-1837, & Seymour, Samuel, fl. 1797-1822. (["Atlas"])[View of the Rocky Mountains on the platte 50 miles from their base]. https://collections.library.yale.edu/catalog/2000896.