ZIEGELMUELLER, G. W. (1997). Argumentation Inquairy & Advocacy George W. Zeigelmueller, Jack Kay. Boston.
Lua i Stíl Chicago (17ú heag.)ZIEGELMUELLER, George W. Argumentation Inquairy & Advocacy George W. Zeigelmueller, Jack Kay. Boston, 1997.
Lua MLA (8ú heag.)ZIEGELMUELLER, George W. Argumentation Inquairy & Advocacy George W. Zeigelmueller, Jack Kay. Boston, 1997.
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