Suzery, Meiny and Ningrum, A N and Nudin, B and S Mulyani, N and Cahyono, B. Determination of Quercetin and Rutin in Red Galangal Rhizomes (Alpinia purpurata) and White Galangal (Alpinia galanga) with High Performance Liquid Chromatography Method. Peer Review dll. (Unpublished)