APA (7th ed.) Citation

Descartes, R., & Clarke, D. M. (2003). Discourse on method, and related writings. Penguin Books.

Chicago Style (17th ed.) Citation

Descartes, René, and Desmond M. Clarke. Discourse on Method, and Related Writings. London: Penguin Books, 2003.

MLA (9th ed.) Citation

Descartes, René, and Desmond M. Clarke. Discourse on Method, and Related Writings. Penguin Books, 2003.