Não informado. (1970). National Parks and Conservation Magazine. National Parks & Conservation Association.
Lua i Stíl Chicago (17ú heag.)Não informado. National Parks and Conservation Magazine. Washington: National Parks & Conservation Association, 1970.
Lua MLA (8ú heag.)Não informado. National Parks and Conservation Magazine. National Parks & Conservation Association, 1970.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.