MLA

Plowden, David (1932). Upper Saloon, Texas Deck, Ferryboat Pocono, Hoboken Ferry, Erie-Lackawanna Railroad, Hudson River (EL-467-27). Box 68. 1967 April. https://collections.library.yale.edu/catalog/2041548.

APA, 6th edition

Plowden, David (1932). (["Box 68"])(1967 April)[Upper Saloon, Texas Deck, Ferryboat Pocono, Hoboken Ferry, Erie-Lackawanna Railroad, Hudson River (EL-467-27)]. https://collections.library.yale.edu/catalog/2041548.