Alfredo R. Rabena. 1994. “The Isolation and Washed Fastness Testing of Crude Natural Dyes of Bagbagotot (Physllantus Reticulatus) Berries from Vigan Ilocos Sur”. The Vector: International Journal of Emerging Science, Technology and Management (IJESTM) 3 (1). https://doi.org/10.69566/ijestm.v3i1.96.