MLA

Stieglitz, Alfred, 1864-1946. Oaklawn. Box 130, folder 2529. ca. 1910. https://collections.library.yale.edu/catalog/2002568.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 130, folder 2529"])(ca. 1910)[Oaklawn]. https://collections.library.yale.edu/catalog/2002568.