Cita APA (7a ed.)

Open Learning Foundation & Barnes, E. (1997). Marketing: An active learning approach (1st published.). Blackwell Business.

Cita Chicago Style (17a ed.)

Open Learning Foundation y Elizabeth Barnes. Marketing: An Active Learning Approach. 1st published. Oxford [etc.]: Blackwell Business, 1997.

Cita MLA (9a ed.)

Open Learning Foundation y Elizabeth Barnes. Marketing: An Active Learning Approach. 1st published. Blackwell Business, 1997.