Philippines. Department of Public Works and Highways & Cantero, P. A. V. (2008). Public Works at 110: Service solid & strong. Department of Public Works and Highways.
Lua i Stíl Chicago (17ú heag.)Philippines. Department of Public Works and Highways agus Patricia Ann V. Cantero. Public Works at 110: Service Solid & Strong. [Manila: Department of Public Works and Highways, 2008.
Lua MLA (9ú heag.)Philippines. Department of Public Works and Highways agus Patricia Ann V. Cantero. Public Works at 110: Service Solid & Strong. Department of Public Works and Highways, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.