Oral Glucose Tolerance Activity of Bawang Dayak (Eleutherine palmifolia L. Merr.) Bulbs Extract Based on the Use of different Extraction Method, Ahmad, Islamudin, Ambarwati Neneng Siti Silfi, Indriyanti Niken, Sastyarina Yurika, Rijai Laode, and Mun?im Abdul , Pharmacognosy Journal, December 2017, Volume 10, Issue 1, p.49-54, (2018)