Conway, D. A., & Munson, R. (1990). The elements of reasoning. Wadsworth.
Cita Chicago (17th ed.)Conway, David A., i Ronald Munson. The Elements of Reasoning. California: Wadsworth, 1990.
Cita MLA (9th ed.)Conway, David A., i Ronald Munson. The Elements of Reasoning. Wadsworth, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.