Thin Layer Chromatography Fingerprinting and Clustering of Orthosiphon stamineus Benth. from Different Origins, Kartini, Kartini, Dewi Ervina Rustiana, Achmad Fandi, Jayani Nikmatul Ikhrom Eka, Hadiyat Mochammad Arbi, and Avanti Christina , Pharmacognosy Journal, February  2020, Volume 12, Issue 1, p.79-87, (2020)