MLA

Plowden, David (1932). Sidewheel, Steamer Alexander Hamilton Approaching Bear Mtn. Landing from Up-River, Taken from Bear Mountain Bridge (HR/DL-863-99). Box 69. 1963 August. https://collections.library.yale.edu/catalog/2041623.

APA, 6th edition

Plowden, David (1932). (["Box 69"])(1963 August)[Sidewheel, Steamer Alexander Hamilton Approaching Bear Mtn. Landing from Up-River, Taken from Bear Mountain Bridge (HR/DL-863-99)]. https://collections.library.yale.edu/catalog/2041623.