MLA

Wharton, Edith, 1862-1937. Friends' Intelligencer. Box 66, folder 1814. 1913 Jul 5. https://collections.library.yale.edu/catalog/2006309.

APA, 6th edition

Wharton, Edith, 1862-1937. (["Box 66, folder 1814"])(1913 Jul 5)[Friends' Intelligencer]. https://collections.library.yale.edu/catalog/2006309.