Skowrung Saibunmi และ Sakchai Hirunrux. (2012) A strategy of instruction for the student piano competition case study : The roon lek (9-12 years old) category of the yamaha Thailand music festival. Mahidol University:ม.ป.ท.Skowrung Saibunmi และ Sakchai Hirunrux. 2012. A strategy of instruction for the student piano competition case study : The roon lek (9-12 years old) category of the yamaha Thailand music festival. ม.ป.ท.:Mahidol University;Skowrung Saibunmi และ Sakchai Hirunrux. A strategy of instruction for the student piano competition case study : The roon lek (9-12 years old) category of the yamaha Thailand music festival. ม.ป.ท.:Mahidol University, 2012. Print.