Cita APA

Whitehead, A. N. 1., & Russell, B. 1. (1973). Principia mathematica (2nd ed., repr.). Cambridge: At the University Press.

Citación estilo Chicago

Whitehead, Alfred North 1861-1947, and Bertrand 1872-1970 Russell. Principia Mathematica. 2nd ed., repr. Cambridge: At the University Press, 1973.

Cita MLA

Whitehead, Alfred North 1861-1947, and Bertrand 1872-1970 Russell. Principia Mathematica. 2nd ed., repr. Cambridge: At the University Press, 1973.