Munson, R., & Black, A. G. (2007). The elements of reasoning (5th ed.). Thomson/Wadsworth.
Lua i Stíl Chicago (17ú heag.)Munson, Ronald, agus Andrew G. Black. The Elements of Reasoning. 5th ed. Belmont, Calif: Thomson/Wadsworth, 2007.
Lua MLA (9ú heag.)Munson, Ronald, agus Andrew G. Black. The Elements of Reasoning. 5th ed. Thomson/Wadsworth, 2007.
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