Cita APA (7th ed.)

Ries, A. (1989). Bottom up marketing. Mcgraw Hill Book Company.

Cita Chicago (17th ed.)

Ries, Al. Bottom Up Marketing. New York: Mcgraw Hill Book Company, 1989.

Cita MLA (9th ed.)

Ries, Al. Bottom Up Marketing. Mcgraw Hill Book Company, 1989.