APA (7th ed.) Citation

Whitehead, A. N., & Russell, B. (1960). Principia mathematica. University Press.

Chicago Style (17th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica. Cambridge: University Press, 1960.

MLA (9th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica. University Press, 1960.

Warning: These citations may not always be 100% accurate.