Chatchadaporn Promnork และผู้แต่งคนอื่นๆ. (2015) Cyberbullying behavior in 4th-6th grade students of a Bangkok municipal school; a qualitative study. Mahidol University:ม.ป.ท.Chatchadaporn Promnork และผู้แต่งคนอื่นๆ. 2015. Cyberbullying behavior in 4th-6th grade students of a Bangkok municipal school; a qualitative study. ม.ป.ท.:Mahidol University;Chatchadaporn Promnork และผู้แต่งคนอื่นๆ. Cyberbullying behavior in 4th-6th grade students of a Bangkok municipal school; a qualitative study. ม.ป.ท.:Mahidol University, 2015. Print.