FATONI, A., ARTIKA, I. M., HASAN, A. E. Z., & KUSWANDI, K. (2009). Antibacterial Activity of Propolis Produced by Trigona spp. Against Campylobacter spp. HAYATI Journal of Biosciences, 15(4), 161. https://doi.org/10.4308/hjb.15.4.161