Cite

Phelps' Ornamental Map of the United States and Mexico.

MLA

Phelps' Ornamental Map of the United States and Mexico. Humphrey Phelps, 1847. https://collections.library.yale.edu/catalog/15536462.

APA, 6th edition

Phelps' Ornamental Map of the United States and Mexico. (1847). [Maps]. Humphrey Phelps, https://collections.library.yale.edu/catalog/15536462.