Cite

Hardy, Katharine E., to Mrs. Henry Phelan Gibb

MLA

Stein, Gertrude, 1874-1946. Hardy, Katharine E., to Mrs. Henry Phelan Gibb. Box 135, folder 2999. 1913 Apr 11. https://collections.library.yale.edu/catalog/17105785.

APA, 6th edition

Stein, Gertrude, 1874-1946. (["Box 135, folder 2999"])(1913 Apr 11)[Hardy, Katharine E., to Mrs. Henry Phelan Gibb]. https://collections.library.yale.edu/catalog/17105785.