MLA

Club, Appalachian Mountain. Map of the Country about Boston / Geo. S. Harris & Sons, Lith. Published by the Appalachian Mountain Club from the proofs of the State map with the permission of the director of the United States Geological Survey and the commissioners of the Topographic Survey of Massachusetts, 1890. https://collections.library.yale.edu/catalog/15654602.

APA, 6th edition

Club, A. M. (1890). Map of the country about Boston / Geo. S. Harris & Sons, lith. [Maps]. Published by the Appalachian Mountain Club from the proofs of the State map with the permission of the director of the United States Geological Survey and the commissioners of the Topographic Survey of Massachusetts, https://collections.library.yale.edu/catalog/15654602.