MLA

Lee, Richard C. (Richard Charles), 1916-2003. Miscellaneous. Box 142, folder 2420-2422. 1961 July. https://collections.library.yale.edu/catalog/10015080.

APA, 6th edition

Lee, Richard C. (Richard Charles), 1916-2003. (["Box 142, folder 2420-2422"])(1961 July)[Miscellaneous]. https://collections.library.yale.edu/catalog/10015080.