ยมรัตน์ เสาวลักษณ์. 2018. “THE DEVELOPMENT OF STUDENT ASSISTANT SYSTEM: A CASE STUDY OF BANNONGJAN SCHOOL, KHAM SAKAESAENG DISTRICT, NAKHON RATCHASIMA PROVINCE”. Ph.D. In Social Sciences Journal 8 (2):101-15. https://so05.tci-thaijo.org/index.php/phdssj/article/view/92216.