Cite

Map of the Canadian Pacific Railway, the Minneapolis, St. Paul and Sault Ste. Marie Railway, the Duluth, South Shore and Atlantic Railway and connections / Poole Bros, engravers.

MLA

Brothers, Poole. Map of the Canadian Pacific Railway, the Minneapolis, St. Paul and Sault Ste. Marie Railway, the Duluth, South Shore and Atlantic Railway and Connections / Poole Bros, Engravers. Poole Bros., 0AD. https://collections.library.yale.edu/catalog/15827298.

APA, 6th edition

Brothers, P. (0 C.E.). Map of the Canadian Pacific Railway, the Minneapolis, St. Paul and Sault Ste. Marie Railway, the Duluth, South Shore and Atlantic Railway and connections / Poole Bros, engravers. [Maps]. Poole Bros., https://collections.library.yale.edu/catalog/15827298.