MLA

Linton, W. J. (William James), 1812-1897. Mazzini, Giuseppe. Box 1, folder 75. 1853–1869. https://collections.library.yale.edu/catalog/17327102.

APA, 6th edition

Linton, W. J. (William James), 1812-1897. (["Box 1, folder 75"])(1853–1869)[Mazzini, Giuseppe]. https://collections.library.yale.edu/catalog/17327102.