APA (7th ed.) Citation

Orr, M. A. (1969). Dante and the early astronomers. Kennikat Press.

Chicago Style (17th ed.) Citation

Orr, M. A. Dante and the Early Astronomers. Port Washington, N.Y.: Kennikat Press, 1969.

MLA (9th ed.) Citation

Orr, M. A. Dante and the Early Astronomers. Kennikat Press, 1969.