Leonard, Annie, author
The story of stuff : how our obsession with stuff is trashing the planet, our communities, and our health - and a vision for change
Free Press, 2010
 Buku Teks
Ahrens, L.H., author
Distribution of the element in our planet
McGraw-Hill, 1965
 Buku Teks
Ballard, Robert D., author
Exploring our living planet
National Geographic Society, 1983
 Buku Referensi
Our planet, our health : report of the WHO Commission on Health and Environment. / WHO Commission on Health and Environment.
World Health Organization, 1992
 Buku Teks
Moon, Glenn W., author
Story of our land and people
Holt, Rinehart and Winston, 1964
 Buku Teks
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