Cita APA (7th ed.)

Ries, A. (1990). Bottom up marketing. Penguin (Plume).

Cita Chicago (17th ed.)

Ries, Al. Bottom Up Marketing. New York: Penguin (Plume), 1990.

Cita MLA (9th ed.)

Ries, Al. Bottom Up Marketing. Penguin (Plume), 1990.