APA (7th ed.) Citation

Leo, I., & Leunclavius, J. (1578). Epistola ad Flavianum.

Chicago Style (17th ed.) Citation

Leo, I., and Johannes Leunclavius. Epistola Ad Flavianum. Basilea, 1578.

MLA (9th ed.) Citation

Leo, I., and Johannes Leunclavius. Epistola Ad Flavianum. 1578.

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