MLA

Camp, Walter, 1859-1925. Football: players, Yale. Box 64, folder 34-35 | reel 46U. undated. https://collections.library.yale.edu/catalog/10014903.

APA, 6th edition

Camp, Walter, 1859-1925. (["Box 64, folder 34-35 | reel 46U"])(undated)[Football: players, Yale]. https://collections.library.yale.edu/catalog/10014903.