Pirages, Dennis C.
The new context for international relations : global ecopolitics
Duxbury Press, 1978
 Buku Teks SO
Watt, Kenneth E.F., 1929-
Understanding the environment / Kenneth E.F. Watt.Understanding the Environment
Allyn and Bacon, 1982
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Gilpin, Robert
The Political economy of international relations
Princeton University Press, 1987
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Griffith, Martin
International relations
Routledge, 2002
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Frankel, Joseph
International relations
Oxford University Press, 1964
 Buku Teks SO