Sirinya Tabsombat และ Mongkol Raksapatcharawong. (2010) The SIP-based radio over internet protocol interoperability communication system for emergency situation. Kasetsart University,:ม.ป.ท.Sirinya Tabsombat และ Mongkol Raksapatcharawong. 2010. The SIP-based radio over internet protocol interoperability communication system for emergency situation. ม.ป.ท.:Kasetsart University,;Sirinya Tabsombat และ Mongkol Raksapatcharawong. The SIP-based radio over internet protocol interoperability communication system for emergency situation. ม.ป.ท.:Kasetsart University, 2010. Print.