MLA

Atwood, John M., b. ca. 1818. Map of the United States, Canada, Mexico, Central America, and the West India Islands : with a portion of Venezuela & New Granada; showing the routes overland and by the Isthmus to California & Oregon, also the new boundaries of California, Utah, & New Me. BRBL_00400. 1851. https://collections.library.yale.edu/catalog/15536483.

APA, 6th edition

Atwood, John M., b. ca. 1818. (["BRBL_00400"])(1851)[Map of the United States, Canada, Mexico, Central America, and the West India Islands : with a portion of Venezuela & New Granada; showing the routes overland and by the Isthmus to California & Oregon, also the new boundaries of California, Utah, & New Me]. https://collections.library.yale.edu/catalog/15536483.