Sukirno, Pradina A., Sambas Basuni, and Adjat Sudradjat. 2020. “Supply Optimization Model of Nature Tourism at Ciwidey Tourism Destination, Wets Java”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 54 (2):112-21. https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/11210.