Earthwatch: The Journal of Earthwatch Institute. Earthwatch Institute.
Lua i Stíl Chicago (17ú heag.)Earthwatch: The Journal of Earthwatch Institute. Earthwatch Institute.
Lua MLA (9ú heag.)Earthwatch: The Journal of Earthwatch Institute. Earthwatch Institute.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.