MLA

Plowden, David (1932). Chicago, St. Paul, Minneapolis Omaha Railroad, Engine Number 416, a J class 2-8-2 type Locomotive (uncropped). Hudson, Wisconsin (No number extant). Box 175. 1956 April. https://collections.library.yale.edu/catalog/10593430.

APA, 6th edition

Plowden, David (1932). (["Box 175"])(1956 April)[Chicago, St. Paul, Minneapolis Omaha Railroad, Engine Number 416, a J class 2-8-2 type Locomotive (uncropped). Hudson, Wisconsin (No number extant)]. https://collections.library.yale.edu/catalog/10593430.