Cita APA (7a ed.)
ebrary, Inc, Hill, J., & Gale, T. (2009). Ecotourism and environmental sustainability: Principles and practice. Ashgate.
Cita Chicago Style (17a ed.)
ebrary, Inc, Jennifer Hill, y Tim Gale. Ecotourism and Environmental Sustainability: Principles and Practice. Farnham, England ; Burlington, VT: Ashgate, 2009.
Cita MLA (9a ed.)
ebrary, Inc, et al. Ecotourism and Environmental Sustainability: Principles and Practice. Ashgate, 2009.
Precaución: Estas citas no son 100% exactas.