Malaay, C. M. (1988). Problems encountered in the implementation of population education in the barangay high schools of La Union, 1986-1987.
Lua i Stíl Chicago (17ú heag.)Malaay, Cipriano M. Problems Encountered in the Implementation of Population Education in the Barangay High Schools of La Union, 1986-1987. 1988.
Lua MLA (9ú heag.)Malaay, Cipriano M. Problems Encountered in the Implementation of Population Education in the Barangay High Schools of La Union, 1986-1987. 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.