Geology Rocks Crystals {Express Edition}. Raintree Publishers.
Lua i Stíl Chicago (17ú heag.)Geology Rocks Crystals {Express Edition}. Raintree Publishers.
Lua MLA (9ú heag.)Geology Rocks Crystals {Express Edition}. Raintree Publishers.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.