Cite

[Two paintings], tempera on paper

MLA

Stieglitz, Alfred, 1864-1946. [Two paintings], tempera on paper. Box 161, folder 2931. 1917, n.d.. https://collections.library.yale.edu/catalog/2012107.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 161, folder 2931"])(1917, n.d.)[[Two paintings], tempera on paper]. https://collections.library.yale.edu/catalog/2012107.