Kotler, P., & Armstrong, G. A. (2014). Principles of marketing (6th edition.). Frenchs Forest, N.S.W. - Pearson.
Lua i Stíl Chicago (17ú heag.)Kotler, Philip, agus Gary; Armstrong Armstrong. Principles of Marketing. 6th edition. Australia: Frenchs Forest, N.S.W. - Pearson, 2014.
Lua MLA (9ú heag.)Kotler, Philip, agus Gary; Armstrong Armstrong. Principles of Marketing. 6th edition. Frenchs Forest, N.S.W. - Pearson, 2014.
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