MLA

Stieglitz, Alfred, 1864-1946. Chabot, Maria. Box 185, folder 3089-3096. 1946-49. https://collections.library.yale.edu/catalog/2003105.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 185, folder 3089-3096"])(1946-49)[Chabot, Maria]. https://collections.library.yale.edu/catalog/2003105.