APA (7th ed.) Zitazioa

(1998). Impacts on state and local agencies for maintaining traffic signs within minimum retroreflectivity guidelines [microform].

Chicago Style (17th ed.) Zitazioa

Impacts on State and Local Agencies for Maintaining Traffic Signs Within Minimum Retroreflectivity Guidelines [microform]. 1998.

MLA (9th ed.) Zitazioa

Impacts on State and Local Agencies for Maintaining Traffic Signs Within Minimum Retroreflectivity Guidelines [microform]. 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.