National Statistical Information Center. (2006). 2006 Philippine statistical yearbook. The National Statistical Information Center.
Lua i Stíl Chicago (17ú heag.)National Statistical Information Center. 2006 Philippine Statistical Yearbook. Makati City: The National Statistical Information Center, 2006.
Lua MLA (9ú heag.)National Statistical Information Center. 2006 Philippine Statistical Yearbook. The National Statistical Information Center, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.