APA aipamena

Baldwin, R. E. (1971). Nontariff distortion of international trade. The Brookings institution.

Chicago Style aipamena

Baldwin, Robert E. Nontariff Distortion of International Trade. Washington: The Brookings institution, 1971.

MLA aipamena

Baldwin, Robert E. Nontariff Distortion of International Trade. The Brookings institution, 1971.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.