MLA

Plowden, David (1932). View Looking Toward Blast Furnaces, Bethlehem Steel, Johnstown Works (Since Razed). Johnstown, Pennsylvania (875-450). Box 9. 1975 August. https://collections.library.yale.edu/catalog/2036779.

APA, 6th edition

Plowden, David (1932). (["Box 9"])(1975 August)[View Looking Toward Blast Furnaces, Bethlehem Steel, Johnstown Works (Since Razed). Johnstown, Pennsylvania (875-450)]. https://collections.library.yale.edu/catalog/2036779.