College of Graduate Studies, Walailak University 222 Thaiburi, Thasala district Nakhon Si Thammarat, 80160THAILAND Tel : +66-7547-6481 | +66-7547-6482 | +66-7547-6483 || +66-7547-6484 | +66-7547-6485 | +66-7547-6486 or Tel +66-7567-3000 Ext. 76481 – 76486Fax : +66-7547-6480E-mail : grad.walailak@gmail.com