APA (7th ed.) Citation

Bonifacio, S. c. 6., Löfstedt, B., & Gebauer, G. J. (1980). Ars grammatica. Typographi Brepols Editores Pontificii.

Chicago Style (17th ed.) Citation

Bonifacio, Santo ca. 680-754, Bengt Löfstedt, and George John Gebauer. Ars Grammatica. Turnholti: Typographi Brepols Editores Pontificii, 1980.

MLA (9th ed.) Citation

Bonifacio, Santo ca. 680-754, et al. Ars Grammatica. Typographi Brepols Editores Pontificii, 1980.