APA (7th ed.) Citation

Birley, A. (1972). Septimius Severus, the African emperor. Doubleday & Co.

Chicago Style (17th ed.) Citation

Birley, Anthony. Septimius Severus, the African Emperor. Garden City, NY: Doubleday & Co, 1972.

MLA (9th ed.) Citation

Birley, Anthony. Septimius Severus, the African Emperor. Doubleday & Co, 1972.

Warning: These citations may not always be 100% accurate.