MLA

Turgenev, Ivan Sergeevich, 1818-1883. Letter : Paris, to [George Gissing]. Box 28, folder GROUP 522, F-5. 1880 Nov 27. https://collections.library.yale.edu/catalog/32600875.

APA, 6th edition

Turgenev, Ivan Sergeevich, 1818-1883. (["Box 28, folder GROUP 522, F-5"])(1880 Nov 27)[Letter : Paris, to [George Gissing]]. https://collections.library.yale.edu/catalog/32600875.