Cite

The Delaware River Memorial Bridges, Delaware River. Wilmington, Delaware (GFB-69-511)

MLA

Plowden, David (1932). The Delaware River Memorial Bridges, Delaware River. Wilmington, Delaware (GFB-69-511). Box 52. 1969. https://collections.library.yale.edu/catalog/2041273.

APA, 6th edition

Plowden, David (1932). (["Box 52"])(1969)[The Delaware River Memorial Bridges, Delaware River. Wilmington, Delaware (GFB-69-511)]. https://collections.library.yale.edu/catalog/2041273.