Malaay, C. M. (1988). Problems encountered in the implementation of population education in the barangay high schools of La Union, 1986-1987.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিMalaay, Cipriano M. Problems Encountered in the Implementation of Population Education in the Barangay High Schools of La Union, 1986-1987. 1988.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিMalaay, Cipriano M. Problems Encountered in the Implementation of Population Education in the Barangay High Schools of La Union, 1986-1987. 1988.
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