APA (7th ed.) Citation

Keeling, S. V. (1968). Descartes (2nd ed.). Oxford U.P..

Chicago Style (17th ed.) Citation

Keeling, S. V. Descartes. 2nd ed. London, New York [etc.]: Oxford U.P., 1968.

MLA (9th ed.) Citation

Keeling, S. V. Descartes. 2nd ed. Oxford U.P., 1968.