Cite

"The Blue Cat," watercolor on paper board

MLA

Stieglitz, Alfred, 1864-1946. "The Blue Cat," watercolor on paper board. Box 159, folder 2911. 1907. https://collections.library.yale.edu/catalog/2002423.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 159, folder 2911"])(1907)["The Blue Cat," watercolor on paper board]. https://collections.library.yale.edu/catalog/2002423.