APA (7th ed.) Citation

Donatus, A., & Gouder, E. (1992). Donatus Ortigraphus. Ars grammatica. Brepols.

Chicago Style (17th ed.) Citation

Donatus, Aelius, and Eddy Gouder. Donatus Ortigraphus. Ars Grammatica. Turnhout: Brepols, 1992.

MLA (9th ed.) Citation

Donatus, Aelius, and Eddy Gouder. Donatus Ortigraphus. Ars Grammatica. Brepols, 1992.

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