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AMM Qurrota A’yun, Nyong Eka Teguh Imam Santosa. Principal Strategy in Developing Positioning In Junior High School of Muhammadiyah Boarding School (MBS) Jombang. IJIE [Internet]. 2020 Aug. 29 [cited 2026 Oct. 16];3(8):174-9. Available from: https://journals.researchparks.org/index.php/IJIE/article/view/559