Cite

Einstein, William: correspondence

MLA

Stieglitz, Alfred, 1864-1946. Einstein, William: correspondence. Box 190, folder 3210-3212. [1956]-72, n.d.. https://collections.library.yale.edu/catalog/32189610.

APA, 6th edition

Stieglitz, Alfred, 1864-1946. (["Box 190, folder 3210-3212"])([1956]-72, n.d.)[Einstein, William: correspondence]. https://collections.library.yale.edu/catalog/32189610.