Martinez, S. T. (1980). Logic: A textbook in deductive reasoning. Alemar-Phoenix.
Cita Chicago (17th ed.)Martinez, Salvador T. Logic: A Textbook in Deductive Reasoning. Quezon City: Alemar-Phoenix, 1980.
Cita MLA (9th ed.)Martinez, Salvador T. Logic: A Textbook in Deductive Reasoning. Alemar-Phoenix, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.