Usman, Andi Nilawati, Yuliana Syam, Rosdiana Natzir, Sutji Pratiwi Rahardjo, Muhammad Hatta, Indah Raya, Yuyun Widaningsih, Andi Zulkifli Abdullah, and Ainurafiq Ainurafiq. 2016. “Nutrient Content and PH of Honey Propolis Trigona from Masamba, South Sulawesi Indonesia”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 26 (3):246-51. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/5661.