"Daniel Wait Howe"Howe Genealogies edited by Gilman Bigelow Howe Record Publishing Company Haverhill Massachusetts 1929: p. 102
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" American Association of Instructors of the Blind Staff Writers"Minutes The Fifteenth Biennial Convention of The American Association of Instructors of the Blind An Appreciation of Michael Anagnos Robert Smith Printing Company State Printers and Binders 1899: p. 52
"Helen Keller". The Helena Independent. Vol. 3, no. 122 , April 08, 1893, Morning, Page 3. Library of Congress. April 8, 1893. Retrieved November 30, 2020.