MLA

Co, Tourist Map Publishing. Tourist Motor Map of Oregon / Compliments of Imperial Garage. Imperial Garage [distributor],, Tourist Map Publishing Co. : 0AD. https://collections.library.yale.edu/catalog/15821614.

APA, 6th edition

Co, T. M. P. (0 C.E.). Tourist motor map of Oregon / compliments of Imperial Garage. [Tourist maps]. Imperial Garage [distributor],, Tourist Map Publishing Co. : https://collections.library.yale.edu/catalog/15821614.