Swatridge Colin. Oxford Guide to Effective Argument and Critical Thinking (om.). Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Swatridge Colin. Oxford Guide to Effective Argument and Critical Thinking. om. United Kingd United Kingd: Oxford University Press.
Lua MLA (9ú heag.)Swatridge Colin. Oxford Guide to Effective Argument and Critical Thinking. om. Oxford University Press.
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