APA (7th ed.) Citation

Whitehead, A. N., & Russell, B. (1970). Principia mathematica: To *56 (Paperback ed., repr. 1970.). Univ. Pr.

Chicago Style (17th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica: To *56. Paperback ed., repr. 1970. Cambridge: Univ. Pr, 1970.

MLA (9th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica: To *56. Paperback ed., repr. 1970. Univ. Pr, 1970.

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