Cite

[On his own paintings] (written for Creative Art), holographs

MLA

Stieglitz, Alfred, 1864-1946. [On his own paintings] (written for Creative Art), holographs. Box 98, folder 1976. 1929. https://collections.library.yale.edu/catalog/2112268.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 98, folder 1976"])(1929)[[On his own paintings] (written for Creative Art), holographs]. https://collections.library.yale.edu/catalog/2112268.