Sakchai Chaiyamahapurk. 2011. Prevention with positives: practice and ploicy. Field of Study Health Systems and Policy, Naresuan University;
Sakchai Chaiyamahapurk. (2011) Prevention with positives: practice and ploicy . Naresuan University/Phitsanulok.
Sakchai Chaiyamahapurk. Prevention with positives: practice and ploicy. . Phitsanulok:Naresuan University, 2011.
Sakchai Chaiyamahapurk. (2011) Prevention with positives: practice and ploicy . Naresuan University/Phitsanulok.