APA Edition Citation

Whitehead, A. N., & Russell, B. (1963). Principia mathematica, Vol.1 (23.).

Chicago Edition Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica, Vol.1. 23. Cambridge University Press, Cambridge, 1963.

MLA Edition Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica, Vol.1. 23. 1963.