Dyfyniad APA

Armstrong,Gary, Kotler,Philip, & Opresnik,Marc O. (2017). Marketing: An introduction (13th ed.). Pearson.

Dyfyniad Arddull Chicago

Armstrong,Gary, Kotler,Philip, and Opresnik,Marc O. Marketing: An Introduction. 13th ed. Noida: Pearson, 2017.

Dyfyniad MLA

Armstrong,Gary, et al. Marketing: An Introduction. 13th ed. Pearson, 2017.

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