Ries, A. (1999). The 22 immutable laws of branding. Harper Collins.
Lua i Stíl Chicago (17ú heag.)Ries, Al. The 22 Immutable Laws of Branding. London: Harper Collins, 1999.
Lua MLA (9ú heag.)Ries, Al. The 22 Immutable Laws of Branding. Harper Collins, 1999.
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