Cooperative Mural Workshops
MLA
Dreier, Katherine S. (Katherine Sophie), 1877-1952. Cooperative Mural Workshops. Box 60, folder 1622. 1915-16, n.d.. https://collections.library.yale.edu/catalog/16694453.
APA, 6th edition
Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 60, folder 1622"])(1915-16, n.d.)[Cooperative Mural Workshops]. https://collections.library.yale.edu/catalog/16694453.