Cita APA (7a ed.)

Newton, I., & Huygens, C. (1996). Mathematical principles of natural philosophy: Optics (2nd, 6th print.). Encyclopædia Britannica.

Cita Chicago Style (17a ed.)

Newton, Isaac, y Christiaan Huygens. Mathematical Principles of Natural Philosophy: Optics. 2nd, 6th print. Chicago: Encyclopædia Britannica, 1996.

Cita MLA (9a ed.)

Newton, Isaac, y Christiaan Huygens. Mathematical Principles of Natural Philosophy: Optics. 2nd, 6th print. Encyclopædia Britannica, 1996.