APA (7th ed.) Citation

Audax, G. 5. b. 6. J., & Keil, H. (1873). Audacis Ars grammatica. Audacis Ars grammatica.

Chicago Style (17th ed.) Citation

Audax, Grammaticus 5. bzw. 6. Jh., and Heinrich Keil. "Audacis Ars Grammatica." Audacis Ars Grammatica 1873.

MLA (9th ed.) Citation

Audax, Grammaticus 5. bzw. 6. Jh., and Heinrich Keil. "Audacis Ars Grammatica." Audacis Ars Grammatica, 1873.

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