Ries, A. (2002). Positioning: The battle for your mind. Salemba Empat.
Chicagoスタイル(17版)引用形式Ries, Al. Positioning: The Battle for Your Mind. Salemba Empat, 2002.
MLA(8版)引用形式Ries, Al. Positioning: The Battle for Your Mind. Salemba Empat, 2002.
警告: この引用は必ずしも正確ではありません.