Cite

Christmas card from Riker

MLA

Kagan, Paul, 1943-1993. Christmas card from Riker. Box 15, folder 277. n.d.. https://collections.library.yale.edu/catalog/17439163.

APA, 6th edition

Kagan, Paul, 1943-1993. (["Box 15, folder 277"])(n.d.)[Christmas card from Riker]. https://collections.library.yale.edu/catalog/17439163.