Lua APA (7ú heag.)
ebrary, Inc, & Buckley, R. (2004). Environmental impacts of ecotourism. CABI Pub..
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc, agus Ralf Buckley. Environmental Impacts of Ecotourism. Wallingford, Oxon, UK ; Cambridge, MA, USA: CABI Pub., 2004.
Lua MLA (9ú heag.)
ebrary, Inc, agus Ralf Buckley. Environmental Impacts of Ecotourism. CABI Pub., 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.