Prasert Yothicar และ Sangkae Punyasiri. (2018) A development model of cultural tourism interpretation of Khao Phra Wihan national park. National Institute of Development Administration:ม.ป.ท.Prasert Yothicar และ Sangkae Punyasiri. 2018. A development model of cultural tourism interpretation of Khao Phra Wihan national park. ม.ป.ท.:National Institute of Development Administration;Prasert Yothicar และ Sangkae Punyasiri. A development model of cultural tourism interpretation of Khao Phra Wihan national park. ม.ป.ท.:National Institute of Development Administration, 2018. Print.