APA
Gary Armstrong P. K., . (2001). Marketing : an introduction. Pearson Education Asia, New Delhi: .
Chicago
Gary Armstrong Philip Kotler, . 2001. Marketing : an introduction. Pearson Education Asia, New Delhi: .
Harvard
Gary Armstrong P. K., . (2001). Marketing : an introduction. Pearson Education Asia, New Delhi: .
MLA
Gary Armstrong Philip Kotler, . Marketing : an introduction. Pearson Education Asia, New Delhi: . 2001.