Ristiono Mei Eka Palguno et al. 2026. Transactional Leadership of the Principal and Teacher Professionalism at SMP Negeri 3 Sungai Ambawang . Attractive : Innovative Education Journal. 8, 3 (Sep. 2026), 668–683. DOI:https://doi.org/10.51278/aj.v8i3.2609.