54. [Cow Parsnip.]
MLA
McClintock, Walter, 1870-1949. 54. [Cow Parsnip.]. Box 70, folder 3949. 1905 1941. https://collections.library.yale.edu/catalog/2010635.
APA, 6th edition
McClintock, Walter, 1870-1949. (["Box 70, folder 3949"])(1905 1941)[54. [Cow Parsnip.]]. https://collections.library.yale.edu/catalog/2010635.