Dyfyniad APA

Kotler, P., & Armstrong, G. (2016). Principles of marketing (Sixteenth edition.). Pearson.

Dyfyniad Arddull Chicago

Kotler, Philip, and Gary Armstrong. Principles of Marketing. Sixteenth edition. Boston: Pearson, 2016.

Dyfyniad MLA

Kotler, Philip, and Gary Armstrong. Principles of Marketing. Sixteenth edition. Pearson, 2016.

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