APA (7th ed.) Zitazioa
Armstrong, G., Kotler, P., Saunders, J., & Wong, V. (2005). Principles of marketing (4th European edition.). Pearson Education.
Chicago Style (17th ed.) Zitazioa
Armstrong, Gary, Philip Kotler, John Saunders, eta Veronica Wong. Principles of Marketing. 4th European edition. Harlow, England: Pearson Education, 2005.
MLA (9th ed.) Zitazioa
Armstrong, Gary, et al. Principles of Marketing. 4th European edition. Pearson Education, 2005.
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