Kotler, P., & Armstrong, G. (1991). Fundamentos de mercadotecnia (2a ed.). Prentice Hall.
Chicago Style (17th ed.) CitationKotler, Philip, and Gary Armstrong. Fundamentos De Mercadotecnia. 2a ed. México, D. F.: Prentice Hall, 1991.
MLA (8th ed.) CitationKotler, Philip, and Gary Armstrong. Fundamentos De Mercadotecnia. 2a ed. Prentice Hall, 1991.
Warning: These citations may not always be 100% accurate.