MLA

Pratt, Richard Henry, 1840-1924. Indian drawings, 11 items. Box 23, folder 735. n.d.. https://collections.library.yale.edu/catalog/2042698.

APA, 6th edition

Pratt, Richard Henry, 1840-1924. (["Box 23, folder 735"])(n.d.)[Indian drawings, 11 items]. https://collections.library.yale.edu/catalog/2042698.