บุญพุฒิกร ชญารัตน์. “Development of attitude scales on behavioral according to code of ethics of teaching profession for student teachers”. RMUTSB ACADEMIC JOURNAL (HUMANITIES AND SOCIAL SCIENCES) 3, no. 2 (December 24, 2018): 177–190. accessed September 10, 2026. https://so05.tci-thaijo.org/index.php/rmutsb-hs/article/view/136652.