Klee, Paul
MLA
Dreier, Katherine S. (Katherine Sophie), 1877-1952. Klee, Paul. Box 20, folder 582. 1922-30, n.d.. https://collections.library.yale.edu/catalog/2014478.
APA, 6th edition
Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 20, folder 582"])(1922-30, n.d.)[Klee, Paul]. https://collections.library.yale.edu/catalog/2014478.