Varot Panitchavit Pinpat และ Rugphong Vongsaroj. (2017) An approach of promoting medical services to foreigner in Bangkok. National Institute of Development Administration:ม.ป.ท.Varot Panitchavit Pinpat และ Rugphong Vongsaroj. 2017. An approach of promoting medical services to foreigner in Bangkok. ม.ป.ท.:National Institute of Development Administration;Varot Panitchavit Pinpat และ Rugphong Vongsaroj. An approach of promoting medical services to foreigner in Bangkok. ม.ป.ท.:National Institute of Development Administration, 2017. Print.