MLA

Plowden, David (1932). S. S. St. Lawrence, Canada Steamship Lines, Departing Down River [last season of operation]. Murray Bay, Quebec, Canada (864-562). Box 70. 1964 August. https://collections.library.yale.edu/catalog/2041633.

APA, 6th edition

Plowden, David (1932). (["Box 70"])(1964 August)[S. S. St. Lawrence, Canada Steamship Lines, Departing Down River [last season of operation]. Murray Bay, Quebec, Canada (864-562)]. https://collections.library.yale.edu/catalog/2041633.