MLA

Map, O. P. Anderson, et al. Anderson's Map of the Upper Yukon and Adjacent Regions. O.P. Anderson Map & Blue Print Co., Inc., 0AD. https://collections.library.yale.edu/catalog/15536381.

APA, 6th edition

Map, O. P. A., Blue Print Company Inc., compiler, & publisher. (0 C.E.). Anderson's map of the upper Yukon and adjacent regions [Maps]. O.P. Anderson Map & Blue Print Co., Inc. https://collections.library.yale.edu/catalog/15536381.