Flieger, W., Koppin, B., & Lim, C. (1976). Geographical patterns of internal migration in the Philippines: 1960-1970. National Census and Statistics Office.
Lua i Stíl Chicago (17ú heag.)Flieger, Wilhelm, Brigida Koppin, agus Carmencita Lim. Geographical Patterns of Internal Migration in the Philippines: 1960-1970. Manila: National Census and Statistics Office, 1976.
Lua MLA (9ú heag.)Flieger, Wilhelm, et al. Geographical Patterns of Internal Migration in the Philippines: 1960-1970. National Census and Statistics Office, 1976.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.