APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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