^"Notable Alumni". Phillips Academy. مؤرشف من الأصل في 2014-04-07. اطلع عليه بتاريخ 2014-08-21.
^Ancestry.com. U.S., World War I Draft Registration Cards, 1917-1918 [database on-line]. John Timothy Callahan, born March 29, 1895, at Lawrence, Mass. Serving in the Naval Reserve at Newport, R.I.