Cite

"Symphony in C Minor" (4 prints)

MLA

Dreier, Katherine S. (Katherine Sophie), 1877-1952. "Symphony in C Minor" (4 prints). Box 71, folder 1852. n.d.. https://collections.library.yale.edu/catalog/17047963.

APA, 6th edition

Dreier, Katherine S. (Katherine Sophie), 1877-1952. (["Box 71, folder 1852"])(n.d.)["Symphony in C Minor" (4 prints)]. https://collections.library.yale.edu/catalog/17047963.