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Lua i Stíl Chicago (17ú heag.)Dutch, Steven I., J. S. Monroe, agus Joseph M. Moran. Earth Science. Belmont, CA: West/Wadsworth, 1998.
Lua MLA (9ú heag.)Dutch, Steven I., et al. Earth Science. West/Wadsworth, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.