Yongyud Wongpiromsarn และผู้แต่งคนอื่นๆ. (2012) Mean Intelligence Quotient of students and Thai educational system in 2011. <i>Journal of Mental Health of Thailand</i>, <i>20</i>(2), 103-112.Yongyud Wongpiromsarn และผู้แต่งคนอื่นๆ. "Mean Intelligence Quotient of students and Thai educational system in 2011". Journal of Mental Health of Thailand 20 (2012):103-112.Yongyud Wongpiromsarn และผู้แต่งคนอื่นๆ. Mean Intelligence Quotient of students and Thai educational system in 2011. Department of Mental Health Thailand:ม.ป.ท. 2012.