Cite

Map of the Oregon Territory / by the U.S. Ex. Ex., Charles Wilkes, 1841.

MLA

Wilkes, Charles, 1798-1877. Map of the Oregon Territory / by the U.S. Ex. Ex., Charles Wilkes, 1841.. BRBL_00533. [1845]. https://collections.library.yale.edu/catalog/15812922.

APA, 6th edition

Wilkes, Charles, 1798-1877. (["BRBL_00533"])([1845])[Map of the Oregon Territory / by the U.S. Ex. Ex., Charles Wilkes, 1841.]. https://collections.library.yale.edu/catalog/15812922.