Supriadi, Bambang. “Pengembangan Ekowisata Poncokusumo Melalui Grand Strategy Matrix Analysis”. Jurnal Pariwisata Pesona 3, no. 2 (December 26, 2018): 119–133. Accessed February 23, 2025. https://jurnal.unmer.ac.id/index.php/jpp/article/view/2436.