Ries, L., & Ries, A. (2000). The 11 immutable laws of Internet branding. New York: HarperBusiness.
Dyfyniad Arddull ChicagoRies, Laura., và Al Ries. The 11 Immutable Laws of Internet Branding. New York: HarperBusiness, 2000.
Dyfyniad MLARies, Laura., và Al Ries. The 11 Immutable Laws of Internet Branding. New York: HarperBusiness, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.