APA (7th ed.) Citation

Whitehead, A. N., & Russell, B. (1981). Principia mathematica: (hasta el *56). Paraninfo.

Chicago Style (17th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica: (hasta El *56). Madrid: Paraninfo, 1981.

MLA (9th ed.) Citation

Whitehead, Alfred North, and Bertrand Russell. Principia Mathematica: (hasta El *56). Paraninfo, 1981.

Warning: These citations may not always be 100% accurate.