Hibbert, E. P. (1990). Management of international trade promotion. Routledge.
Chicago Style aipamenaHibbert, Edgar P. Management of International Trade Promotion. London: Routledge, 1990.
MLA aipamenaHibbert, Edgar P. Management of International Trade Promotion. Routledge, 1990.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.