MLA

Johnson, James Weldon, 1871-1938. James Weldon Johnson, Rosamond Johnson, and Agnes M. Edwards at Stanton Elementary School (Jacksonville, Florida). Box 104, folder 876. circa 1880. https://collections.library.yale.edu/catalog/16794054.

APA, 6th edition

Johnson, James Weldon, 1871-1938. (["Box 104, folder 876"])(circa 1880)[James Weldon Johnson, Rosamond Johnson, and Agnes M. Edwards at Stanton Elementary School (Jacksonville, Florida)]. https://collections.library.yale.edu/catalog/16794054.