Anugrah A, Hanim Z, Nurlaelah N. Principal’s Strategic Planning in Improving the Quality of Education in Bontang City Vocational High Schools. eduline j. educ. learn. innov. [Internet]. 2022 Sep. 28 [cited 2026 Apr. 19];2(3):312-21. Available from: https://jurnal.ahmar.id/index.php/eduline/article/view/1237