Ries, A. (1994). The 22 immutable laws of marketing. London:HarperCollins.
Chicago Style CitationRies, Al. The 22 Immutable Laws of Marketing. London:HarperCollins, 1994.
MLA CitationRies, Al. The 22 Immutable Laws of Marketing. London:HarperCollins, 1994.
Warning: These citations may not always be 100% accurate.