Portfolio: Stieglitz at Lake George (27 mounted prints)
MLA
Stieglitz, Alfred, 1864-1946. Portfolio: Stieglitz at Lake George (27 mounted prints). Box 139, folder 2612. n.d.. https://collections.library.yale.edu/catalog/10050206.
APA, 6th edition
Stieglitz, Alfred, 1864-1946. (["Box 139, folder 2612"])(n.d.)[Portfolio: Stieglitz at Lake George (27 mounted prints)]. https://collections.library.yale.edu/catalog/10050206.