Dyfyniad APA

Armstrong, G., Kotler, P., & Opresnik, M. O. (2017). Marketing: An introduction (Thirteenth edition.). Pearson Education Limited.

Dyfyniad Arddull Chicago

Armstrong, Gary, Philip Kotler, and Marc O. Opresnik. Marketing: An Introduction. Thirteenth edition. Harlow, Essex, England: Pearson Education Limited, 2017.

Dyfyniad MLA

Armstrong, Gary, et al. Marketing: An Introduction. Thirteenth edition. Pearson Education Limited, 2017.

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