KOTLER (Philip)/ ARMSTRONG (G.), . (2001). Principles of Marketing. New Delhi: Pearson Education Delhi, Harlow, Singapore.
KOTLER (Philip)/ ARMSTRONG (G.), . 2001. Principles of Marketing. New Delhi: Pearson Education Delhi, Harlow, Singapore.
KOTLER (Philip)/ ARMSTRONG (G.), . Principles of Marketing. New Delhi: Pearson Education Delhi, Harlow, Singapore. 2001.