Berry, T. (1988). The dream of the earth. Sierra Club.
Lua i Stíl Chicago (17ú heag.)Berry, Thomas. The Dream of the Earth. San Francisco: Sierra Club, 1988.
Lua MLA (9ú heag.)Berry, Thomas. The Dream of the Earth. Sierra Club, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.