Supakit Thiamtawan และ Nattama Pongpairoj. (2013) Avoidance of the use of English participial reduced relative clauses among L1 Thai learners. Chulalongkorn University:ม.ป.ท.Supakit Thiamtawan และ Nattama Pongpairoj. 2013. Avoidance of the use of English participial reduced relative clauses among L1 Thai learners. ม.ป.ท.:Chulalongkorn University;Supakit Thiamtawan และ Nattama Pongpairoj. Avoidance of the use of English participial reduced relative clauses among L1 Thai learners. ม.ป.ท.:Chulalongkorn University, 2013. Print.