Cita APA (7a ed.)

Whitehead, A. N., & Russell, B. (1962). Principia mathematica to *56. Cambridge University Press.

Cita Chicago Style (17a ed.)

Whitehead, Alfred North, y Bertrand Russell. Principia Mathematica to *56. Cambridge [etc.]: Cambridge University Press, 1962.

Cita MLA (9a ed.)

Whitehead, Alfred North, y Bertrand Russell. Principia Mathematica to *56. Cambridge University Press, 1962.