MLA

Stieglitz, Alfred, 1864-1946. [Seven still life paintings attributed to Kitty Stieglitz], watercolor and tempera on paper. Box 160, folder 2925. [1910]. https://collections.library.yale.edu/catalog/16057245.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 160, folder 2925"])([1910])[[Seven still life paintings attributed to Kitty Stieglitz], watercolor and tempera on paper]. https://collections.library.yale.edu/catalog/16057245.