Kotabe, M., & Helsen, K. (1998). Global marketing management. John Wiley & Sons.
Chicago Style aipamenaKotabe, Masaaki, and Kristiaan Helsen. Global Marketing Management. New York: John Wiley & Sons, 1998.
MLA aipamenaKotabe, Masaaki, and Kristiaan Helsen. Global Marketing Management. John Wiley & Sons, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.