Arimurti, Danang Johar, and Fatma Ulfatun Najicha. “Ponorogo Regency Green Open Space Analysis of Law Number 27 of 2007 Concerning Spatial Planning”. Indonesian Journal of Environmental Law and Sustainable Development 2, no. 2 (July 31, 2023): 199-210. Accessed May 12, 2024. https://journal.unnes.ac.id/sju/ijel/article/view/70662.