Cita APA (7a ed.)

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.