Theerapong Theerathanongwut และ Chokechai Suveatwatanakul. (2016) Developing human resource development guideline based on relationship marketing to enhance effectiveness on business performance in airline business. National Institute of Development Administration:ม.ป.ท.Theerapong Theerathanongwut และ Chokechai Suveatwatanakul. 2016. Developing human resource development guideline based on relationship marketing to enhance effectiveness on business performance in airline business. ม.ป.ท.:National Institute of Development Administration;Theerapong Theerathanongwut และ Chokechai Suveatwatanakul. Developing human resource development guideline based on relationship marketing to enhance effectiveness on business performance in airline business. ม.ป.ท.:National Institute of Development Administration, 2016. Print.