Samranjit, N., A. Boonratmaitree, H. Choopen, and R. Jiwalai. “Applicability of New Public Management Principles in Management of the Ministry of Foreign Affairs: An Analysis of Passport Servicing”. Ph.D. In Social Sciences Journal, vol. 10, no. 1, Apr. 2020, pp. 87-103, https://so05.tci-thaijo.org/index.php/phdssj/article/view/148591.