Anna, Zuzy, Purna Hindayani, and Intan Adhi Perdana Putri. “Indonesian Cities Green Development Index: A Prototype Measurement”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 37, no. 3 (April 9, 2018): 290–308. Accessed May 5, 2024. https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/8883.