Kittikan Kanchanakhuha และ Kassara Sukpatch. (2017) Development of small-sized travel enterprises as an innovative organization. National Institute of Development Administration:ม.ป.ท.Kittikan Kanchanakhuha และ Kassara Sukpatch. 2017. Development of small-sized travel enterprises as an innovative organization. ม.ป.ท.:National Institute of Development Administration;Kittikan Kanchanakhuha และ Kassara Sukpatch. Development of small-sized travel enterprises as an innovative organization. ม.ป.ท.:National Institute of Development Administration, 2017. Print.