[Meaning of plastic expression]
MLA
Mondrian, Piet, 1872-1944. [Meaning of plastic expression]. Box 2, folder 62. circa 1942-1943. https://collections.library.yale.edu/catalog/16037199.
APA, 6th edition
Mondrian, Piet, 1872-1944. (["Box 2, folder 62"])(circa 1942-1943)[[Meaning of plastic expression]]. https://collections.library.yale.edu/catalog/16037199.