DOUGLAS, S. P. (1995). Global Marketing Strategy. McGraw-Hill.
Chicago Style aipamenaDOUGLAS, Susan P. Global Marketing Strategy. McGraw-Hill, 1995.
MLA aipamenaDOUGLAS, Susan P. Global Marketing Strategy. McGraw-Hill, 1995.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.