Letters
MLA
Stieglitz, Alfred, 1864-1946. Letters. Box 81, folder 1666-1668. 1917 Jan-Feb. https://collections.library.yale.edu/catalog/2038434.
APA, 6th edition
Stieglitz, Alfred, 1864-1946. (["Box 81, folder 1666-1668"])(1917 Jan-Feb)[Letters]. https://collections.library.yale.edu/catalog/2038434.