Boolos, G. (1993). The Logic of Provability. Univ. Pr..
Cita Chicago (17th ed.)Boolos, George. The Logic of Provability. Cambridge: Univ. Pr., 1993.
Cita MLA (9th ed.)Boolos, George. The Logic of Provability. Univ. Pr., 1993.
Atenció: Aquestes cites poden no estar 100% correctes.