Cite

Black Mountain College (Black Mountain, N.C.)

MLA

Williams, William Carlos, 1883-1963. Black Mountain College (Black Mountain, N.C.). Box 2, folder 61. 1950, undated. https://collections.library.yale.edu/catalog/17049451.

APA, 6th edition

Williams, William Carlos, 1883-1963. (["Box 2, folder 61"])(1950, undated)[Black Mountain College (Black Mountain, N.C.)]. https://collections.library.yale.edu/catalog/17049451.