Pernia, E. M. (1980). A note on migration and fertility. School of Economics, University of the Philippines.
Lua i Stíl Chicago (17ú heag.)Pernia, Ernesto M. A Note on Migration and Fertility. [Quezon City]: School of Economics, University of the Philippines, 1980.
Lua MLA (9ú heag.)Pernia, Ernesto M. A Note on Migration and Fertility. School of Economics, University of the Philippines, 1980.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.