ISBN 0-8078-2118-7. Sauers, Richard A., "Battle of Gettysburg", Encyclopedia of theAmericanCivilWar: A Political, Social, and Military History, Heidler, David S., and
Fighting Joe Hooker, American Heritage magazine, October 1993. Warner, Ezra J., Generals in Blue: Lives of the Union Commanders, Louisiana State University
Commanders, Louisiana State University Press, 1959, ISBN 0-8071-0823-5. 위키미디어 공용에 관련된 미디어 분류가 있습니다. 리처드 유얼 Ewell's biography at CivilWar Home Biography