KOTLER (Philip)/ ARMSTRONG (G), . (2002). Principles of Marketing. : Prentice Hall of India New Delhi.
KOTLER (Philip)/ ARMSTRONG (G), . 2002. Principles of Marketing. : Prentice Hall of India New Delhi.
KOTLER (Philip)/ ARMSTRONG (G), . Principles of Marketing. : Prentice Hall of India New Delhi. 2002.