Ries, A. (1990). Bottom up marketing. Penguin (Plume).
Chicago Style (17th ed.) CitationRies, Al. Bottom Up Marketing. New York: Penguin (Plume), 1990.
MLA (9th ed.) CitationRies, Al. Bottom Up Marketing. Penguin (Plume), 1990.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.