Alegre, M. P., & Morada, H. B. (1987). Internal migration in the Philippines: A historical perspective. The Journal of HIstory.
Lua i Stíl Chicago (17ú heag.)Alegre, Marietta P., agus Hector B. Morada. "Internal Migration in the Philippines: A Historical Perspective." The Journal of HIstory 1987.
Lua MLA (9ú heag.)Alegre, Marietta P., agus Hector B. Morada. "Internal Migration in the Philippines: A Historical Perspective." The Journal of HIstory, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.