Nusbaumer, J. (1987). Services in the global market. Klumer Academic.
Chicago Style aipamenaNusbaumer, Jacques. Services in the Global Market. Boston: Klumer Academic, 1987.
MLA aipamenaNusbaumer, Jacques. Services in the Global Market. Klumer Academic, 1987.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.