APA (7th ed.) Zitazioa

(1971). Liberal trade v. protectionism.

Chicago Style (17th ed.) Zitazioa

Liberal Trade V. Protectionism. 1971.

MLA (9th ed.) Zitazioa

Liberal Trade V. Protectionism. 1971.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.