Biodiversity Management Bureau & Department of Environment and Natural Resources. (2017). Philippine caves: Beneath the earth's surface : conservation and management. Department of Environment and Natural Resources, Biodiversity Management Bureau.
Chicago Style (17th ed.) CitationBiodiversity Management Bureau and Department of Environment and Natural Resources. Philippine Caves: Beneath the Earth's Surface : Conservation and Management. Quezon City, Philippines: Department of Environment and Natural Resources, Biodiversity Management Bureau, 2017.
MLA (8th ed.) CitationBiodiversity Management Bureau and Department of Environment and Natural Resources. Philippine Caves: Beneath the Earth's Surface : Conservation and Management. Department of Environment and Natural Resources, Biodiversity Management Bureau, 2017.