Usman, A. N.; Syam, Y.; Natzir, R.; Rahardjo, S. P.; Hatta, M.; Raya, I.; Widaningsih, Y.; Abdullah, A. Z.; Ainurafiq, A. Nutrient Content and PH of Honey Propolis Trigona from Masamba, South Sulawesi Indonesia. IJSBAR 2016, 26, 246-251.