Cite

Powell, John W., 1 item; Pratt, Daniel D., 2 items

MLA

Pratt, Richard Henry, 1840-1924. Powell, John W., 1 item; Pratt, Daniel D., 2 items. Box 7, folder 251. 1877, 1873-1874. https://collections.library.yale.edu/catalog/17104172.

APA, 6th edition

Pratt, Richard Henry, 1840-1924. (["Box 7, folder 251"])(1877, 1873-1874)[Powell, John W., 1 item; Pratt, Daniel D., 2 items]. https://collections.library.yale.edu/catalog/17104172.