APA (7th ed.) Citation

Dillon, J. M. Plotinus, Philo and Origen on the Grades of Virtue.

Chicago Style (17th ed.) Citation

Dillon, John M. Plotinus, Philo and Origen on the Grades of Virtue.

MLA (9th ed.) Citation

Dillon, John M. Plotinus, Philo and Origen on the Grades of Virtue.

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