MLA

Plowden, David (1932). Canadian Pacific Railway, The Glen Engine Terminal. Montreal, Quebec, Canada (CPR-360-37). Box 173. 1960 March. https://collections.library.yale.edu/catalog/2043939.

APA, 6th edition

Plowden, David (1932). (["Box 173"])(1960 March)[Canadian Pacific Railway, The Glen Engine Terminal. Montreal, Quebec, Canada (CPR-360-37)]. https://collections.library.yale.edu/catalog/2043939.