APA (7th ed.) Citation

Bartsch, A. v., & Koch, R. A. (1978). Early german masters. Abaris Books.

Chicago Style (17th ed.) Citation

Bartsch, Adam von, and Robert A. Koch. Early German Masters. New York: Abaris Books, 1978.

MLA (9th ed.) Citation

Bartsch, Adam von, and Robert A. Koch. Early German Masters. Abaris Books, 1978.