MLA

Pratt, Richard Henry, 1840-1924. Hyde, Alexander, 17 items. Box 4, folder 134. 1879-80. https://collections.library.yale.edu/catalog/32323619.

APA, 6th edition

Pratt, Richard Henry, 1840-1924. (["Box 4, folder 134"])(1879-80)[Hyde, Alexander, 17 items]. https://collections.library.yale.edu/catalog/32323619.