Ries, A., & Trout, J. (2007). The 22 Immutable Laws of Marketing. Profile Books Ltd.
Lua i Stíl Chicago (17ú heag.)Ries, Al, agus Jack Trout. The 22 Immutable Laws of Marketing. London: Profile Books Ltd, 2007.
Lua MLA (9ú heag.)Ries, Al, agus Jack Trout. The 22 Immutable Laws of Marketing. Profile Books Ltd, 2007.
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