APA (7th ed.) Zitazioa
Kotler. Principles of Marketing 19/e. Pearson Education.
Chicago Style (17th ed.) Zitazioa
Kotler. Principles of Marketing 19/e. Pearson Education.
MLA (9th ed.) Zitazioa
Kotler. Principles of Marketing 19/e. Pearson Education.
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