Villaver, E. S. (1988). Mathematics instructions in grade I schools District of Sagbayan, 1987-1988: Implications to teaching proficiency and effectiveness.
Παραπομπή σε μορφή Chicago (17η εκδ.)Villaver, Eugenia Sitoy. Mathematics Instructions in Grade I Schools District of Sagbayan, 1987-1988: Implications to Teaching Proficiency and Effectiveness. 1988.
Παραπομπή σε μορφή MLA (9th εκδ.)Villaver, Eugenia Sitoy. Mathematics Instructions in Grade I Schools District of Sagbayan, 1987-1988: Implications to Teaching Proficiency and Effectiveness. 1988.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.