MLA

Pratt, Richard Henry, 1840-1924. Miscellaneous papers, 13 items. Box 14, folder 493. 1877. https://collections.library.yale.edu/catalog/17104182.

APA, 6th edition

Pratt, Richard Henry, 1840-1924. (["Box 14, folder 493"])(1877)[Miscellaneous papers, 13 items]. https://collections.library.yale.edu/catalog/17104182.