Keegan, W. J. (1997). Principles of global marketing. Prentice-Hall.
Chicago Style (17th ed.) ZitazioaKeegan, Warren J. Principles of Global Marketing. Upper Saddle River, New Jersey: Prentice-Hall, 1997.
MLA (9th ed.) ZitazioaKeegan, Warren J. Principles of Global Marketing. Prentice-Hall, 1997.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.