APA (7th ed.) Zitazioa

(1972). The new look in traffic signs and markings, signs, signals and pavement markings.

Chicago Style (17th ed.) Zitazioa

The New Look in Traffic Signs and Markings, Signs, Signals and Pavement Markings. 1972.

MLA (9th ed.) Zitazioa

The New Look in Traffic Signs and Markings, Signs, Signals and Pavement Markings. 1972.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.