Meadows, Donella H., author
John Wiley and Sons, 1982
Buku Teks
United Nations Departemen of Public Information, 1990
Buku Teks
Salvatore, Dominick, author
McGraw-Hill, 1993
Buku Teks
Sachs, Jeffrey D., author
Harvester, 1993
Buku Teks
Salvatore, Dominick, author
McGraw-Hill, 1996
Buku Teks
Arouri, Mohamed, editor
Academic Press, 2014
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