Angell, R. B. (1964). Reasoning and logic. Appleton-Century-Crofts.
Lua i Stíl Chicago (17ú heag.)Angell, Richard B. Reasoning and Logic. New York: Appleton-Century-Crofts, 1964.
Lua MLA (9ú heag.)Angell, Richard B. Reasoning and Logic. Appleton-Century-Crofts, 1964.
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