Sagala, Lambok P., et al. “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]”. Media Konservasi, vol. 13, no. 2, Feb. 2011, https://doi.org/10.29244/medkon.13.2.%p.