Cita APA (7th ed.)

Georgacarakos, G., & Smith, R. (1979). Elementary formal logic. McGraw-Hill.

Cita Chicago (17th ed.)

Georgacarakos, G.N, i Robin Smith. Elementary Formal Logic. New York: McGraw-Hill, 1979.

Cita MLA (9th ed.)

Georgacarakos, G.N, i Robin Smith. Elementary Formal Logic. McGraw-Hill, 1979.