Cite

Cowley, Malcolm: Ad for Obelisk Waterproofing Company

MLA

Crane, Hart, 1899-1932. Cowley, Malcolm: Ad for Obelisk Waterproofing Company. Box 4, folder 127. 1925. https://collections.library.yale.edu/catalog/32194347.

APA, 6th edition

Crane, Hart, 1899-1932. (["Box 4, folder 127"])(1925)[Cowley, Malcolm: Ad for Obelisk Waterproofing Company]. https://collections.library.yale.edu/catalog/32194347.