Map of the United States and Mexico.
MLA
Ensign, Bridgman, and Fanning. Map of the United States and Mexico. Ensign, Bridgman & Fanning ;, Sowle & Ward, 43 Cornhill, 0AD. https://collections.library.yale.edu/catalog/15535369.
APA, 6th edition
Ensign, B., & F. (0 C.E.). Map of the United States and Mexico. [Maps]. Ensign, Bridgman & Fanning ;, Sowle & Ward, 43 Cornhill, https://collections.library.yale.edu/catalog/15535369.