Utton, M. A., & Morgan, A. D. (1983). Concentration and foreign trade. Cambridge University Press.
Chicago Style aipamenaUtton, M. A., and Ann D. Morgan. Concentration and Foreign Trade. Cambridge: Cambridge University Press, 1983.
MLA aipamenaUtton, M. A., and Ann D. Morgan. Concentration and Foreign Trade. Cambridge University Press, 1983.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.