APA (7e ed.) Bronvermelding

Walker, O. C. &. O. (2011). Marketing Strategy: A decision -focused approach (5.). Tata McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Walker, Orville C & Others. Marketing Strategy: A Decision -focused Approach. 5. New Delhi: Tata McGraw-Hill, 2011.

MLA (9e ed.) Bronvermelding

Walker, Orville C & Others. Marketing Strategy: A Decision -focused Approach. 5. Tata McGraw-Hill, 2011.