Christiana Demaja Wilhelmina Sahertian, Onisimus Amtu and Rukhama Aralaha, "Improving Student Cooperation Skills Using the Jigsaw and Stad Model," Journal of Critical Reviews, vol. 7, no. 14, pp. 229-234, 2020.
Onisimus Amtu, Korlina Makulua, Jacoba Matital and Claudia Monique Pattiruhu, "Improving Student Learning Outcomes through School Culture, Work Motivation and Teacher Performance" IJI: International Journal of Instruction, vol 13 no 4, pp. 885-902, 2020.
Sjeny Liza Souisa, Onisimus Amtu and Lourine Since Joseph, "Implementation of Teacher Metacognition to Improve the Quality of Christian Religious Learning in Schools," EMSJ: European Modern Studies Journal, vol. 4, no. 6, pp. 1-9, 2020.
Onisimus Amtu, S L Souisa, L S Joseph and P C Lumamuly, "Contribution of Leadership, Organizational Commitment and Organizational Culture to Improve the Quality of Higher Education," IJI, vol IX no1, pp 131-157, 2021.
Korlina Makulua and Onisimus Amtu, "Analysis of the Influence of Professional Competence and Pedagogic on the Work Motivation of Christian Education Teachers", IJSTR VOL 9, ISSUE 01, JANUARY 2020, pp. 4358-4361.
