MLA

Thayer, Scofield, 1889-1982. Stieglitz, Alfred. Box 41, folder 1179. 1923. https://collections.library.yale.edu/catalog/17142323.

APA, 6th edition

Thayer, Scofield, 1889-1982. (["Box 41, folder 1179"])(1923)[Stieglitz, Alfred]. https://collections.library.yale.edu/catalog/17142323.