Preparasi mikrosfer kitosan etil selulosa dengan metode emulsi taut silang untuk pelepasan terkendali asetogenin dari daun sirsak annona muricata l = Preparation of chitosan ethyl cellulose microsphere by emulsion crosslinking method for controlled release of acetogenin from soursop leaves annona muricata l (Fakultas Teknik Univerisitas Indonesia, 2013)