Kowalski, R. (1979). Logic for problem solving. North-Holland.
Cita Chicago Style (17a ed.)Kowalski, Roberto. Logic for Problem Solving. New York: North-Holland, 1979.
Cita MLA (8a ed.)Kowalski, Roberto. Logic for Problem Solving. North-Holland, 1979.
Precaución: Estas citas no son 100% exactas.