APA (7th ed.) Citation

Oman, C. W. C. (1918). Coins of Severus and Gallienus commemorating the Roman Legions.

Chicago Style (17th ed.) Citation

Oman, Charles William Chadwick. Coins of Severus and Gallienus Commemorating the Roman Legions. 1918.

MLA (9th ed.) Citation

Oman, Charles William Chadwick. Coins of Severus and Gallienus Commemorating the Roman Legions. 1918.

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