MLA

Pratt, Richard Henry, 1840-1924. General orders, 6 items. Box 14, folder 497. 1875-78. https://collections.library.yale.edu/catalog/17104184.

APA, 6th edition

Pratt, Richard Henry, 1840-1924. (["Box 14, folder 497"])(1875-78)[General orders, 6 items]. https://collections.library.yale.edu/catalog/17104184.