Cite

Colorado : with sectional map of adjoining states / [prepared for] Texaco.

MLA

McNally, Rand, and Company. Colorado : with Sectional Map of Adjoining States / [Prepared for] Texaco. Rand McNally and Co., 0AD. https://collections.library.yale.edu/catalog/15818468.

APA, 6th edition

McNally, R., & C. (0 C.E.). Colorado : with sectional map of adjoining states / [prepared for] Texaco. [Road maps]. Rand McNally and Co., https://collections.library.yale.edu/catalog/15818468.