Natwarong Thienpramuk และ Nuttakrit Powintara. (2018) The effect of external players on Thailand steel industry's survival. National Institute of Development Administration:ม.ป.ท.Natwarong Thienpramuk และ Nuttakrit Powintara. 2018. The effect of external players on Thailand steel industry's survival. ม.ป.ท.:National Institute of Development Administration;Natwarong Thienpramuk และ Nuttakrit Powintara. The effect of external players on Thailand steel industry's survival. ม.ป.ท.:National Institute of Development Administration, 2018. Print.