Ryan, John C., author
Seven wonders : everyday things for a healtheir planet
Sierra Club Books, 1999
 Buku Teks
Dasmann, Raymond F. (Raymond Fredric), author
The Conservation alternative
John Wiley & Sons, 1975
 Buku Teks
Kaufman, Donald G., author
Biosphere 2000 : protecting our global environment
Kendall/Hunt, 1996
 Buku Teks
Chiras, Daniel D., author
Natural resource conservation: management for a sustainable future
Pearson, 2014
 Buku Teks
Greenland, David, author
Guidelines for modern resource management soil, land, water, air
Charles E. Merrill, 1983
 Buku Teks
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