Rungruedee Boonmee และ Paitoon Monpanthong. (2021) Policy implication of tourism management for Japanese senior tourists : a case study of Chiang Rai Province, Thailand. National Institute of Development Administration:ม.ป.ท.Rungruedee Boonmee และ Paitoon Monpanthong. 2021. Policy implication of tourism management for Japanese senior tourists : a case study of Chiang Rai Province, Thailand. ม.ป.ท.:National Institute of Development Administration;Rungruedee Boonmee และ Paitoon Monpanthong. Policy implication of tourism management for Japanese senior tourists : a case study of Chiang Rai Province, Thailand. ม.ป.ท.:National Institute of Development Administration, 2021. Print.