Whitehead, A. N., & Russell, B. (1927). Principia mathematica. London: Cambridge University press.
Chicago Style CitationWhitehead, Alfred North., i Bertrand Russell. Principia Mathematica. London: Cambridge University press, 1927.
Cita MLAWhitehead, Alfred North., i Bertrand Russell. Principia Mathematica. London: Cambridge University press, 1927.
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