APA (7th ed.) Citation

Caspar, M. (1959). Kepler. Abelard-Schuman.

Chicago Style (17th ed.) Citation

Caspar, Max. Kepler. London, New York: Abelard-Schuman, 1959.

MLA (9th ed.) Citation

Caspar, Max. Kepler. Abelard-Schuman, 1959.