MLA

Plowden, David (1932). TSS Princess Marguerite, Canadian Pacific Steamships, off Port Angeles, Washington (GFB-68-3816). Box 56. 1968. https://collections.library.yale.edu/catalog/2041339.

APA, 6th edition

Plowden, David (1932). (["Box 56"])(1968)[TSS Princess Marguerite, Canadian Pacific Steamships, off Port Angeles, Washington (GFB-68-3816)]. https://collections.library.yale.edu/catalog/2041339.