Sirinpa Wongsaroj และ Therdchai Choibamroong. (2021) The Luxury outbound tour operator competency development model for high-end Thai Tourists to Russian Federation. National Institute of Development Administration:ม.ป.ท.Sirinpa Wongsaroj และ Therdchai Choibamroong. 2021. The Luxury outbound tour operator competency development model for high-end Thai Tourists to Russian Federation. ม.ป.ท.:National Institute of Development Administration;Sirinpa Wongsaroj และ Therdchai Choibamroong. The Luxury outbound tour operator competency development model for high-end Thai Tourists to Russian Federation. ม.ป.ท.:National Institute of Development Administration, 2021. Print.