MLA

Kagan, Paul, 1943-1993. Alice Constance Austin. Architectural drawings. Box 6, folder 115. n.d.. https://collections.library.yale.edu/catalog/12231358.

APA, 6th edition

Kagan, Paul, 1943-1993. (["Box 6, folder 115"])(n.d.)[Alice Constance Austin. Architectural drawings]. https://collections.library.yale.edu/catalog/12231358.