Hayes, Denis
The official Earth Day guide to planet repair
Island Press, 2000
Buku Teks
The traveller's guide to planet Earth : experience 50 extraordinary destinations from the BBC's spectacular documentary
BBC Earth (Firm)
Lonely Planet, 2010
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Botkin, Daniel B.
Environmental science : earth as a living planet
John Wiley & Sons, 2003
Buku Teks
Botkin, Daniel B.
Environmental science : earth as a living planet
John Wiley & Sons, 1995
Buku Teks
Planet earth : Macmillan world atlas
Macmillan, 1991
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