APA (7th ed.) Zitazioa

(1977). Safety and health in dock work.

Chicago Style (17th ed.) Zitazioa

Safety and Health in Dock Work. 1977.

MLA (9th ed.) Zitazioa

Safety and Health in Dock Work. 1977.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.