ดวงไทย ธวัชชัย. 2020. “Motivation and Factors in Determining to Present the Smog and Wildlife Problems of Local Newspaper Reporters in Chiang Mai and Chiang Rai”. SIAM COMMUNICATION REVIEW 19 (2):106-15. https://so05.tci-thaijo.org/index.php/commartsreviewsiamu/article/view/248318.