MLA

Freeman, Walter, 1895-1972. 1927. World Series. Box 4, folder 152. 1912. https://collections.library.yale.edu/catalog/10011003.

APA, 6th edition

Freeman, Walter, 1895-1972. (["Box 4, folder 152"])(1912)[1927. World Series]. https://collections.library.yale.edu/catalog/10011003.