Ries A I & Trout, J. (1993). Twenty two immutable laws of marketing.
シカゴスタイル引用形Ries A I , Jack Trout. Twenty Two Immutable Laws of Marketing. :, 1993.
MLA引用形式Ries A I , Jack Trout. Twenty Two Immutable Laws of Marketing. 1993.
警告: この引用は必ずしも正確ではありません.