Cita APA

Whitehead, A. N., & Russell, B. (1925). Principia mathematica University Press.

Citación estilo Chicago

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica. 2nd ed. Cambridge: University Press, 1925.

Cita MLA

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica. 2nd ed. Cambridge: University Press, 1925.