Grennan, W. (1997). Informal logic: Issues and techniques. McGill-Queen's University Press.
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Chicago-čujuhus (17. p.)
Grennan, Wayne. Informal Logic: Issues and Techniques. Montreal ; Buffalo: McGill-Queen's University Press, 1997.
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MLA-čujuhus (9. p.)
Grennan, Wayne. Informal Logic: Issues and Techniques. McGill-Queen's University Press, 1997.
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