MLA

Plowden, David (1932). Canadian National Railways, Three Hinged Spandrel-Braced Deck and Span. Fraser River, Siska Creek, British Columbia, Canada (GFB-68-5020). Box 131. 1968. https://collections.library.yale.edu/catalog/2042320.

APA, 6th edition

Plowden, David (1932). (["Box 131"])(1968)[Canadian National Railways, Three Hinged Spandrel-Braced Deck and Span. Fraser River, Siska Creek, British Columbia, Canada (GFB-68-5020)]. https://collections.library.yale.edu/catalog/2042320.