MLA

Plowden, David (1932). Steel Mills Along Indiana Harbor Canal, Former Jones Laughlin (LTV Corp.). Indiana Harbor Canal, East Chicago, Indiana (JL-482-83). Box 11. 1982 April. https://collections.library.yale.edu/catalog/2038413.

APA, 6th edition

Plowden, David (1932). (["Box 11"])(1982 April)[Steel Mills Along Indiana Harbor Canal, Former Jones Laughlin (LTV Corp.). Indiana Harbor Canal, East Chicago, Indiana (JL-482-83)]. https://collections.library.yale.edu/catalog/2038413.