Cita APA (7a ed.)

Whitehead, A. N., & Russell, B. (1973). Principia mathematica to *56 (Repr.). At the University Press.

Cita Chicago Style (17a ed.)

Whitehead, Alfred North, y Bertrand Russell. Principia Mathematica to *56. Repr. Cambrige: At the University Press, 1973.

Cita MLA (9a ed.)

Whitehead, Alfred North, y Bertrand Russell. Principia Mathematica to *56. Repr. At the University Press, 1973.