MLA

Profile of Hoosac Mountain Showing Tunnel, 1877. J.B. Richards & Co., 1877. https://collections.library.yale.edu/catalog/15654622.

APA, 6th edition

Profile of Hoosac Mountain showing tunnel, 1877. (1877). [Maps]. J.B. Richards & Co., https://collections.library.yale.edu/catalog/15654622.