Indian Institute of foreign trade. (1973). Generalised system of preferences. I.I.F.T.
Chicago Style aipamenaIndian Institute of foreign trade. Generalised System of Preferences. New Delhi: I.I.F.T, 1973.
MLA aipamenaIndian Institute of foreign trade. Generalised System of Preferences. I.I.F.T, 1973.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.