APA (7th ed.) Citation

Whitehead, A. N., & Russell, B. (1973). Principia mathematica: To ... 56 (Repr.). Univ Pr.

Chicago Style (17th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica: To ... 56. Repr. Cambridge: Univ Pr, 1973.

MLA (9th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica: To ... 56. Repr. Univ Pr, 1973.

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