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Lua i Stíl Chicago (17ú heag.)World Resources Institute. The ... Information Please Environmental Almanac. Boston: Houghton Mifflin Co, 1991.
Lua MLA (9ú heag.)World Resources Institute. The ... Information Please Environmental Almanac. Houghton Mifflin Co, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.