APA
Kotler, . (2008). Principle of marketing. Prentice-Hall of India, New Delhi: .
Chicago
Kotler, . 2008. Principle of marketing. Prentice-Hall of India, New Delhi: .
Harvard
Kotler, . (2008). Principle of marketing. Prentice-Hall of India, New Delhi: .
MLA
Kotler, . Principle of marketing. Prentice-Hall of India, New Delhi: . 2008.