APA
Kotler P. &. A. G., . (2001). Principles of marketing. Prentice Hall International: New Delhi.
Chicago
Kotler Philip & Armstrong Gary, . 2001. Principles of marketing. Prentice Hall International: New Delhi.
Harvard
Kotler P. &. A. G., . (2001). Principles of marketing. Prentice Hall International: New Delhi.
MLA
Kotler Philip & Armstrong Gary, . Principles of marketing. Prentice Hall International: New Delhi. 2001.