Gurdjieff, Georges Ivanovitch
MLA
Luhan, Mabel Dodge, 1879-1962. Gurdjieff, Georges Ivanovitch. Box 72, folder 1962. n.d.. https://collections.library.yale.edu/catalog/10259965.
APA, 6th edition
Luhan, Mabel Dodge, 1879-1962. (["Box 72, folder 1962"])(n.d.)[Gurdjieff, Georges Ivanovitch]. https://collections.library.yale.edu/catalog/10259965.