Principia mathematica /
by Alfred North Whitehead and Bertrand Russell.
APA Citation
Whitehead, A. North., Russell, B. (1963). Principia mathematica. 2d ed. Cambridge [Eng.]: University Press.
MLA Citation
Whitehead, Alfred North, 1861-1947, and Bertrand Russell. Principia Mathematica. 2d ed. Cambridge [Eng.]: University Press, 1963.
Warning: These citations may not always be complete (especially for serials).