Cita APA (7th ed.)

Walker, O. C. (2009). Marketing Strategy (5th.). Tata McGraw Hill Education Private Limited.

Cita Chicago (17th ed.)

Walker, Orville C. Marketing Strategy. 5th. New Delhi: Tata McGraw Hill Education Private Limited, 2009.

Cita MLA (9th ed.)

Walker, Orville C. Marketing Strategy. 5th. Tata McGraw Hill Education Private Limited, 2009.