Dyfyniad APA

Ries Al. (2004). Origin of Brands. Harper Collins.

Dyfyniad Arddull Chicago

Ries Al. Origin of Brands. New York: Harper Collins, 2004.

Dyfyniad MLA

Ries Al. Origin of Brands. Harper Collins, 2004.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.