Busarin Wongwiwattana และ Chokechai Suveatwatanakul. (2017) The development of 21st century learning skills to enhance the performance effectiveness of convention hotel staff in Thailand. National Institute of Development Administration:ม.ป.ท.Busarin Wongwiwattana และ Chokechai Suveatwatanakul. 2017. The development of 21st century learning skills to enhance the performance effectiveness of convention hotel staff in Thailand. ม.ป.ท.:National Institute of Development Administration;Busarin Wongwiwattana และ Chokechai Suveatwatanakul. The development of 21st century learning skills to enhance the performance effectiveness of convention hotel staff in Thailand. ม.ป.ท.:National Institute of Development Administration, 2017. Print.