McKay, U. Theo
MLA
McKay, Claude, 1890-1948. McKay, U. Theo. Box 5, folder 143. 1929-33. https://collections.library.yale.edu/catalog/16742353.
APA, 6th edition
McKay, Claude, 1890-1948. (["Box 5, folder 143"])(1929-33)[McKay, U. Theo]. https://collections.library.yale.edu/catalog/16742353.