^Cowan, Ross; illustrated by Angus McBride. Imperial Roman Legionary AD 161-284. Osprey Publishing. 2003: p. 17. ISBN 1-84176-601-1.引文使用过时参数coauthors (帮助) 引文格式1维护:冗余文本 (link)
^ 2.02.1Lesley Adkins: Handbook to Life in Ancient Rome, Sonlight Christian, 2004, ISBN 0-8160-5026-0, p. 61.
^Lawrence Keppie: The making of the Roman Army. From Republic to Empire, University of Oklahoma Press, Oklahoma 1998, ISBN 978-0-8061-3014-9, p. 210.