Kotler Philip. (2001). Principles of marketing-9 th editions. New .Jersey: Prentice Hall.
Chicago Style CitationKotler Philip. Principles of Marketing-9 Th Editions. New .Jersey: Prentice Hall, 2001.
MLA CitationKotler Philip. Principles of Marketing-9 Th Editions. New .Jersey: Prentice Hall, 2001.
Warning: These citations may not always be 100% accurate.