Ries , A. &. (1990). Bottom-up marketing. Penguin.
Chicago Style (17th ed.) CitationRies , Al &Trout. Bottom-up Marketing. New York: Penguin, 1990.
MLA (9th ed.) CitationRies , Al &Trout. Bottom-up Marketing. Penguin, 1990.
Warning: These citations may not always be 100% accurate.