Whitehead, A. N., & Russell, B. (1927). Principia mathematica (2nd ed.). Cambridge University Press.
Chicago Style (17th ed.) CitationWhitehead, Alfred North, and Bertrand Russell. Principia Mathematica. 2nd ed. Cambridge: Cambridge University Press, 1927.
MLA (9th ed.) CitationWhitehead, Alfred North, and Bertrand Russell. Principia Mathematica. 2nd ed. Cambridge University Press, 1927.
Warning: These citations may not always be 100% accurate.