Mahon, John K. and Romana Danysh INFANTRY Part I: Regular Army, p. 6. Office of the Chief of Military History, United States Army, Washington, D.C., 1972, Library of Congress Catalog Card Number: 74-610219. Retrieved September 28, 2010. Archived March 1, 2010, at the Wayback Machine
Mahon, John K. and Romana Danysh INFANTRY Part I: Regular Army, p. 6. Office of the Chief of Military History, United States Army, Washington, D.C., 1972, Library of Congress Catalog Card Number: 74-610219. Retrieved September 28, 2010. Archived March 1, 2010, at the Wayback Machine