Cita APA (7th ed.)
Copi, I. M. A concise introduction to logic. Macmillan Company.
Cita Chicago (17th ed.)
Copi, Irving M. A Concise Introduction to Logic. New York: Macmillan Company.
Cita MLA (9th ed.)
Copi, Irving M. A Concise Introduction to Logic. Macmillan Company.
Atenció: Aquestes cites poden no estar 100% correctes.