APA (7th ed.) Zitazioa

freeman, C. (1982). The economics of industrial innovation (2th. ed.). Christopher freeman.

Chicago Style (17th ed.) Zitazioa

freeman, Christopher. The Economics of Industrial Innovation. 2th. ed. london: Christopher freeman, 1982.

MLA (9th ed.) Zitazioa

freeman, Christopher. The Economics of Industrial Innovation. 2th. ed. Christopher freeman, 1982.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.