MLA

Plowden, David (1932). Former Great Western (Gulf, Mobile and Ohio RR) Bridge, Mississippi River. Between Louisiana and Missouri (798-350). Box 135. 1998 July. https://collections.library.yale.edu/catalog/2042429.

APA, 6th edition

Plowden, David (1932). (["Box 135"])(1998 July)[Former Great Western (Gulf, Mobile and Ohio RR) Bridge, Mississippi River. Between Louisiana and Missouri (798-350)]. https://collections.library.yale.edu/catalog/2042429.