Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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