Alnavis NB, Martono DN, Hamzah US. Recommendations for Improving the ISO 14001 Certification Based on the Company’s Perception Analysis of the Certification Obstacles and Benefits. JKL [Internet]. 2021 Jul. 31 [cited 2024 Nov. 30];13(3):132-41. Available from: https://e-journal.unair.ac.id/JKL/article/view/26321