APA (7th ed.) Citation

Groningen Round Table, Heny, F., & Schnelle, H. S. (1979). Selections from the third Groningen Round Table. Academic Press.

Chicago Style (17th ed.) Citation

Groningen Round Table, Frank Heny, and Helmut S. Schnelle. Selections from the Third Groningen Round Table. New York [etc.]: Academic Press, 1979.

MLA (9th ed.) Citation

Groningen Round Table, et al. Selections from the Third Groningen Round Table. Academic Press, 1979.