MLA

Plowden, David (1932). Toledo, Peoria Western Railroad and Illinois Central Railroad Depot. El Paso, Illinois (GFB-68-5908). Box 172. 1968. https://collections.library.yale.edu/catalog/2043911.

APA, 6th edition

Plowden, David (1932). (["Box 172"])(1968)[Toledo, Peoria Western Railroad and Illinois Central Railroad Depot. El Paso, Illinois (GFB-68-5908)]. https://collections.library.yale.edu/catalog/2043911.