Cortina III และ Carlos D. (1992) Factors related to motorcycle accidents : a survey at Police General hospital and Bangkok Metropolitan area. Mahidol University,:ม.ป.ท.Cortina III และ Carlos D. 1992. Factors related to motorcycle accidents : a survey at Police General hospital and Bangkok Metropolitan area. ม.ป.ท.:Mahidol University,;Cortina III และ Carlos D. Factors related to motorcycle accidents : a survey at Police General hospital and Bangkok Metropolitan area. ม.ป.ท.:Mahidol University, 1992. Print.