Cite

Blank letterhead, envelope, and labels

MLA

Kagan, Paul, 1943-1993. Blank letterhead, envelope, and labels. Box 15, folder 276. n.d.. https://collections.library.yale.edu/catalog/17439162.

APA, 6th edition

Kagan, Paul, 1943-1993. (["Box 15, folder 276"])(n.d.)[Blank letterhead, envelope, and labels]. https://collections.library.yale.edu/catalog/17439162.