Cite

Automobile road map of the western United States, including adjacent Canada and Mexico / compiled and drawn by the Map Division of the Automobile Club of Southern California.

MLA

of Southern California, Automobile Club. Automobile Road Map of the Western United States, Including Adjacent Canada and Mexico / Compiled and Drawn by the Map Division of the Automobile Club of Southern California. The Club, 1950. https://collections.library.yale.edu/catalog/15812999.

APA, 6th edition

of Southern California, A. C. (1950). Automobile road map of the western United States, including adjacent Canada and Mexico / compiled and drawn by the Map Division of the Automobile Club of Southern California. [Road maps]. The Club, https://collections.library.yale.edu/catalog/15812999.