Cita APA

Smullyan, R. M. (1961). Theory of formal systems Princeton University Press.

Citación estilo Chicago

Smullyan, Raymond M. Theory of Formal Systems. Rev. ed. Princeton, New Jersey: Princeton University Press, 1961.

Cita MLA

Smullyan, Raymond M. Theory of Formal Systems. Rev. ed. Princeton, New Jersey: Princeton University Press, 1961.