MLA

Jones, James, 1921-1977. Poems by other authors. Box 25, folder 312-16. n.d.. https://collections.library.yale.edu/catalog/17063390.

APA, 6th edition

Jones, James, 1921-1977. (["Box 25, folder 312-16"])(n.d.)[Poems by other authors]. https://collections.library.yale.edu/catalog/17063390.