MLA

Gombrowicz, Witold, 1904-1969. Family trees, typescript and typescript carbon. Box 56, folder 1468. n.d.. https://collections.library.yale.edu/catalog/2007803.

APA, 6th edition

Gombrowicz, Witold, 1904-1969. (["Box 56, folder 1468"])(n.d.)[Family trees, typescript and typescript carbon]. https://collections.library.yale.edu/catalog/2007803.