APA
Kotler P., Armstrong G., . (2009). Principles of Marketing. New Delhi: .
Chicago
Kotler Philip, Armstrong Gary, . 2009. Principles of Marketing. New Delhi: .
Harvard
Kotler P., Armstrong G., . (2009). Principles of Marketing. New Delhi: .
MLA
Kotler Philip, Armstrong Gary, . Principles of Marketing. New Delhi: . 2009.