Webster, G. (1980). The Roman invasion of Britain. Barnes & Noble.
Chicago Style (17th ed.) ZitazioaWebster, Graham. The Roman Invasion of Britain. Totowa, N.J.: Barnes & Noble, 1980.
MLA (9th ed.) ZitazioaWebster, Graham. The Roman Invasion of Britain. Barnes & Noble, 1980.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.