APA (7th ed.) Citation

Birley, A. (1989). Septimius Severus, the African emperor (Rev. ed.). Yale Univ. Pr.

Chicago Style (17th ed.) Citation

Birley, Anthony. Septimius Severus, the African Emperor. Rev. ed. New Haven u.a: Yale Univ. Pr, 1989.

MLA (9th ed.) Citation

Birley, Anthony. Septimius Severus, the African Emperor. Rev. ed. Yale Univ. Pr, 1989.