"L" general
MLA
Schwartz, Delmore, 1913-1966. "L" general. Box 1, folder 64. 1946-1961, undated. https://collections.library.yale.edu/catalog/32260512.
APA, 6th edition
Schwartz, Delmore, 1913-1966. (["Box 1, folder 64"])(1946-1961, undated)["L" general]. https://collections.library.yale.edu/catalog/32260512.