Cita APA (7th ed.)
ebrary, Inc, & Buckley, R. (2004). Environmental impacts of ecotourism. CABI Pub..
Cita Chicago (17th ed.)
ebrary, Inc, i Ralf Buckley. Environmental Impacts of Ecotourism. Wallingford, Oxon, UK ; Cambridge, MA, USA: CABI Pub., 2004.
Cita MLA (9th ed.)
ebrary, Inc, i Ralf Buckley. Environmental Impacts of Ecotourism. CABI Pub., 2004.
Atenció: Aquestes cites poden no estar 100% correctes.