Kotler, P., & Armstrong, G. (2008). Principles of marketing (12th ed.). Pearson/Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Kotler, Philip, agus Gary Armstrong. Principles of Marketing. 12th ed. Upper Saddle River, N.J. ; New Delhi: Pearson/Prentice Hall, 2008.
Lua MLA (8ú heag.)Kotler, Philip, agus Gary Armstrong. Principles of Marketing. 12th ed. Pearson/Prentice Hall, 2008.
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