SagalaL. P., MuntasibE. H., and W.N. B., “PERMINTAAN EKOWISATA WISATAWAN MANCANEGARA DI TAMAN NASIONAL BROMO TENGGER SEMERU (TNBTS), JAWA TIMUR [Ecotourism Demand of International Tourists at Bromo Tengger Semeru National Park (BTSNP), East Java]”, Medkon, vol. 13, no. 2, 1.