HARRD, R. International Economics/ R.f. Harrd. Cambridge Univ. Press.
Chicago Style aipamenaHARRD, R.F. International Economics/ R.f. Harrd. Cambridge Univ. Press.
MLA aipamenaHARRD, R.F. International Economics/ R.f. Harrd. Cambridge Univ. Press.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.