APA (7th ed.) Citation

Birley, A. (1989). Septimius Severus: The African emperor (Rev. ed.). Yale University Press.

Chicago Style (17th ed.) Citation

Birley, Anthony. Septimius Severus: The African Emperor. Rev. ed. New Haven: Yale University Press, 1989.

MLA (9th ed.) Citation

Birley, Anthony. Septimius Severus: The African Emperor. Rev. ed. Yale University Press, 1989.