MLA

Todd, Mabel Loomis, 1856-1932. Foreword. Box 72, folder 78. 1912. https://collections.library.yale.edu/catalog/33514913.

APA, 6th edition

Todd, Mabel Loomis, 1856-1932. (["Box 72, folder 78"])(1912)[Foreword]. https://collections.library.yale.edu/catalog/33514913.