Brewster, Mary Phillips (June 10, 1939), "Obituary, Charles Leonard Phillips", Seventieth Annual Report of the Association of Graduates of the United States Military Academy, Newburgh, New York: Moore Printing Company, p. 139, archived from the original on October 4, 2023, retrieved October 1, 2023 – via West Point Digital Library
Brewster, Mary Phillips (June 10, 1939), "Obituary, Charles Leonard Phillips", Seventieth Annual Report of the Association of Graduates of the United States Military Academy, Newburgh, New York: Moore Printing Company, p. 139, archived from the original on October 4, 2023, retrieved October 1, 2023 – via West Point Digital Library