Caldicott, H. (1992). If you love this planet: A plan to heal the earth. W.W. Norton.
Lua i Stíl Chicago (17ú heag.)Caldicott, Helen. If You Love This Planet: A Plan to Heal the Earth. New York: W.W. Norton, 1992.
Lua MLA (8ú heag.)Caldicott, Helen. If You Love This Planet: A Plan to Heal the Earth. W.W. Norton, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.