Whiting, D. (1978). International trade and payments. Macdonalds & Evans.
Chicago Style aipamenaWhiting, D. International Trade and Payments. London: Macdonalds & Evans, 1978.
MLA aipamenaWhiting, D. International Trade and Payments. Macdonalds & Evans, 1978.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.