Cita APA (7a ed.)

Newton, I., & Huygens, C. (1994). Mathematical principles of natural philosophy: Optics (2nd ed., 5th printing.). Encyclopaedia Britannica.

Cita Chicago Style (17a ed.)

Newton, Isaac, y Christiaan Huygens. Mathematical Principles of Natural Philosophy: Optics. 2nd ed., 5th printing. Chicago, Ill. [etc.]: Encyclopaedia Britannica, 1994.

Cita MLA (9a ed.)

Newton, Isaac, y Christiaan Huygens. Mathematical Principles of Natural Philosophy: Optics. 2nd ed., 5th printing. Encyclopaedia Britannica, 1994.