Gris, Juan
MLA
Stein, Gertrude, 1874-1946. Gris, Juan. Box 153, folder 3766. n.d.. https://collections.library.yale.edu/catalog/9998173.
APA, 6th edition
Stein, Gertrude, 1874-1946. (["Box 153, folder 3766"])(n.d.)[Gris, Juan]. https://collections.library.yale.edu/catalog/9998173.