"His Majesty the Baby"
MLA
Patterson, Catharine T. (Catharine Tinker). "His Majesty the Baby". Box 2, folder 29. [1910-1911]. https://collections.library.yale.edu/catalog/2039605.
APA, 6th edition
Patterson, Catharine T. (Catharine Tinker). (["Box 2, folder 29"])([1910-1911])["His Majesty the Baby"]. https://collections.library.yale.edu/catalog/2039605.