Rong Phoophuangpairoj. (1997) Verification of message exchange in a model of office communication. Mahidol University,:ม.ป.ท.Rong Phoophuangpairoj. 1997. Verification of message exchange in a model of office communication. ม.ป.ท.:Mahidol University,;Rong Phoophuangpairoj. Verification of message exchange in a model of office communication. ม.ป.ท.:Mahidol University, 1997. Print.