MLA

Stieglitz, Alfred, 1864-1946. James, Rebecca Salsbury Strand. Box 26, folder 612-614. 1926-46, n.d.. https://collections.library.yale.edu/catalog/2005596.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 26, folder 612-614"])(1926-46, n.d.)[James, Rebecca Salsbury Strand]. https://collections.library.yale.edu/catalog/2005596.