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Lua i Stíl Chicago (17ú heag.)International Friends of Nature. Everybody's Talking About Soft Tourism: We're Doing Something About It! : Ten Practical Examples of What the Friends of Nature Have Done. Vienna: International Friends of Nature, 1991.
Lua MLA (8ú heag.)International Friends of Nature. Everybody's Talking About Soft Tourism: We're Doing Something About It! : Ten Practical Examples of What the Friends of Nature Have Done. International Friends of Nature, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.