Philippines. Ministry of Labor. Labor Statistics Service. (1978). 1975 regional profile. The Ministry.
Lua i Stíl Chicago (17ú heag.)Philippines. Ministry of Labor. Labor Statistics Service. 1975 Regional Profile. Manila: The Ministry, 1978.
Lua MLA (9ú heag.)Philippines. Ministry of Labor. Labor Statistics Service. 1975 Regional Profile. The Ministry, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.