Damon, S. Foster (Samuel Foster)
MLA
Butts, Mary, 1890-1937. Damon, S. Foster (Samuel Foster). Box 1, folder 19. n.d.. https://collections.library.yale.edu/catalog/16893646.
APA, 6th edition
Butts, Mary, 1890-1937. (["Box 1, folder 19"])(n.d.)[Damon, S. Foster (Samuel Foster)]. https://collections.library.yale.edu/catalog/16893646.