APA (7th ed.) Citation

Caspar, M., Hellman, C. D., & Gingerich, O. (1993). Kepler. Dover Publications.

Chicago Style (17th ed.) Citation

Caspar, Max, Clarisse Dorris Hellman, and Owen Gingerich. Kepler. New York: Dover Publications, 1993.

MLA (8th ed.) Citation

Caspar, Max, et al. Kepler. Dover Publications, 1993.