I Wei Liu และ Pornpimol Sukavatee. (2017) The effects of debate instruction through a flipped learning environment on speaking ability and critical thinking skills of Thai high school students. Chulalongkorn University:ม.ป.ท.I Wei Liu และ Pornpimol Sukavatee. 2017. The effects of debate instruction through a flipped learning environment on speaking ability and critical thinking skills of Thai high school students. ม.ป.ท.:Chulalongkorn University;I Wei Liu และ Pornpimol Sukavatee. The effects of debate instruction through a flipped learning environment on speaking ability and critical thinking skills of Thai high school students. ม.ป.ท.:Chulalongkorn University, 2017. Print.