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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.
Onisimus Amtu, Fakhruddin, Haryono and Muhsin, Proceedings of the 5th International Conference on Science, Education and Technology, ISET 2019, 29th June 2019, Semarang, Central Java, Indonesia, "Improve the Quality of Higher Education through Leadership