Armstrong, G., & Kotler, P. (2011). Marketing: An introduction (10th ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Armstrong, Gary, agus Philip Kotler. Marketing: An Introduction. 10th ed. Boston, Mass: Prentice Hall, 2011.
Lua MLA (9ú heag.)Armstrong, Gary, agus Philip Kotler. Marketing: An Introduction. 10th ed. Prentice Hall, 2011.
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