Nainggolan M, Ardika IW, Ardhana IK, Setiawan IK. Pentahelix model application for tourism development strategy. ijllc [Internet]. 2020 Mar. 2 [cited 2024 Jul. 16];6(2):12-8. Available from: https://sloap.org/journals/index.php/ijllc/article/view/864