Cite

F926a. Duckhead. On White Horse.

MLA

McClintock, Walter, 1870-1949. F926a. Duckhead. On White Horse.. Box 141, folder 7052. 1909. https://collections.library.yale.edu/catalog/10452745.

APA, 6th edition

McClintock, Walter, 1870-1949. (["Box 141, folder 7052"])(1909)[F926a. Duckhead. On White Horse.]. https://collections.library.yale.edu/catalog/10452745.