Malaay, C. M. (1988). Problems encountered in the implementation of population education in the barangay high schools of La Union, 1986-1987.
Chicago-referens (17:e uppl.)Malaay, Cipriano M. Problems Encountered in the Implementation of Population Education in the Barangay High Schools of La Union, 1986-1987. 1988.
MLA-referens (9:e uppl.)Malaay, Cipriano M. Problems Encountered in the Implementation of Population Education in the Barangay High Schools of La Union, 1986-1987. 1988.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.