APA (7th ed.) Citation

Whitehead, A. N., & Russell, B. (1962). Principia mathematica to *56. Cambridge University Press.

Chicago Style (17th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica to *56. Cambridge [etc.]: Cambridge University Press, 1962.

MLA (9th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica to *56. Cambridge University Press, 1962.