NAUDI SIMON. (2003). GENTLE ART OF FIRM PERSUASION. SPIRO PRESS.
Chicagoスタイル(17版)引用形式NAUDI SIMON. GENTLE ART OF FIRM PERSUASION. LONDON: SPIRO PRESS, 2003.
MLA(9版)引用形式NAUDI SIMON. GENTLE ART OF FIRM PERSUASION. SPIRO PRESS, 2003.
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