MLA

Plowden, David (1932). Canadian Pacific Railway, Steamer Keewatin, Bow Detail. Port McNicoll, Ontario, Canada (964-600). Box 174. 1964 September. https://collections.library.yale.edu/catalog/2043960.

APA, 6th edition

Plowden, David (1932). (["Box 174"])(1964 September)[Canadian Pacific Railway, Steamer Keewatin, Bow Detail. Port McNicoll, Ontario, Canada (964-600)]. https://collections.library.yale.edu/catalog/2043960.