Armstrong, G., & Kotler, P. (2015). Marketing: An introduction (Twelfth edition.). Pearson.
Lua i Stíl Chicago (17ú heag.)Armstrong, Gary, agus Philip Kotler. Marketing: An Introduction. Twelfth edition. Boston: Pearson, 2015.
Lua MLA (9ú heag.)Armstrong, Gary, agus Philip Kotler. Marketing: An Introduction. Twelfth edition. Pearson, 2015.
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