Dyfyniad APA

Keegan, W. J. (1997). Principles of global marketing. Prentice-Hall.

Dyfyniad Arddull Chicago

Keegan, Warren J. Principles of Global Marketing. Upper Saddle River, New Jersey: Prentice-Hall, 1997.

Dyfyniad MLA

Keegan, Warren J. Principles of Global Marketing. Prentice-Hall, 1997.

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