Cita APA (7th ed.)

Vieira, W. (1997). The new sales manager: Challenges for twenty first century. Resoponse.

Cita Chicago (17th ed.)

Vieira, Walter. The New Sales Manager: Challenges for Twenty First Century. New Delhi: Resoponse, 1997.

Cita MLA (9th ed.)

Vieira, Walter. The New Sales Manager: Challenges for Twenty First Century. Resoponse, 1997.