Cite

Rand McNally official 1924 auto trails map, Idaho.

MLA

McNally, Rand, and Company. Rand McNally Official 1924 Auto Trails Map, Idaho. Rand McNally, 0AD. https://collections.library.yale.edu/catalog/15818346.

APA, 6th edition

McNally, R., & C. (0 C.E.). Rand McNally official 1924 auto trails map, Idaho. [Road maps]. Rand McNally, https://collections.library.yale.edu/catalog/15818346.