Doctor, T. R.; Manuel, J. J. F.; Rivera, M. P.; Kebasen, C. A.; Bulayungan, F. L. Water Quality of the Main Water Source of Village Ambassador, Tublay, Benguet Using the Allium Cepa Test. jpair 2010, 5 (1), 97-111. https://doi.org/10.7719/jpair.v5i1.126.