Copi.Irving M. (2004). Introduction to Logic (11.). Prentice-Hall of India.
Chicago-čujuhus (17. p.)Copi.Irving M. Introduction to Logic. 11. New Delhi: Prentice-Hall of India, 2004.
MLA-čujuhus (9. p.)Copi.Irving M. Introduction to Logic. 11. Prentice-Hall of India, 2004.
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