MLA

Company, New England Railway Publishing. The ABC Pathfinder Railway Guide, Western Section / Issued by the New England Railway Publishing Company. The Company, 0AD. https://collections.library.yale.edu/catalog/15827806.

APA, 6th edition

Company, N. E. R. P. (0 C.E.). The ABC Pathfinder Railway Guide, Western Section / issued by the New England Railway Publishing Company. [Maps]. The Company, https://collections.library.yale.edu/catalog/15827806.