El-haq, Azzam Dhia, and Imam Fauji. 2022. “The Effect of Principal Supervision and Managerial Competence on Teacher Performance at SDIT EL-HAQ Sidoarjo”. European Multidisciplinary Journal of Modern Science 9 (August):155-61. https://emjms.academicjournal.io/index.php/emjms/article/view/750.