20. [Yellow Flower and White Flowers.]
MLA
McClintock, Walter, 1870-1949. 20. [Yellow Flower and White Flowers.]. Box 70, folder 3894. 1905 1941. https://collections.library.yale.edu/catalog/2010644.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 70, folder 3894"])(1905 1941)[20. [Yellow Flower and White Flowers.]]. https://collections.library.yale.edu/catalog/2010644.