Cita APA (7a ed.)

Whitehead, A. N., & Russell, B. (1957). Principia mathematica (2nd ed.). Cambridge University.

Cita Chicago Style (17a ed.)

Whitehead, Alfred North, y Bertrand Russell. Principia Mathematica. 2nd ed. Cambridge: Cambridge University, 1957.

Cita MLA (9a ed.)

Whitehead, Alfred North, y Bertrand Russell. Principia Mathematica. 2nd ed. Cambridge University, 1957.