Knight, Eric and friends
MLA
Knight, Eric, 1897-1943. Knight, Eric and friends. Box 15, folder 340. 1942, n.d.. https://collections.library.yale.edu/catalog/2014307.
APA, 6th edition
Knight, Eric, 1897-1943. (["Box 15, folder 340"])(1942, n.d.)[Knight, Eric and friends]. https://collections.library.yale.edu/catalog/2014307.