Thailand Online Expo 2013 ,25 - 28 April 2013

The 4th Research Symposium on Petroleum and Petrochemical , April 23, 2013

Annual General Meeting of PTT's shareholders , April 11,2013

41th National Book Fair &11th Bangkok International Book Fair 2013 , 29 March - 08 April 2013

Happy Workplace Forum 3.1, March 25 - 26 , 2013