Cita APA (7th ed.)
Copi , I. M. (1953). A concise introduction to logic. Macmillan Company.
Cita Chicago (17th ed.)
Copi , Irving M. A Concise Introduction to Logic. New York: Macmillan Company, 1953.
Cita MLA (9th ed.)
Copi , Irving M. A Concise Introduction to Logic. Macmillan Company, 1953.
Atenció: Aquestes cites poden no estar 100% correctes.