Gödel, K. F. (1992). On formally undecidable propositions of principia mathematica and related systems. Dover.
Citazione stile Chigago Style (17a edizione)Gödel, Kurt Friedrich. On Formally Undecidable Propositions of Principia Mathematica and Related Systems. Nueva York: Dover, 1992.
Citatione MLA (9a ed.)Gödel, Kurt Friedrich. On Formally Undecidable Propositions of Principia Mathematica and Related Systems. Dover, 1992.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.