The world system and the earth system
edited by Alf Hornborg and Carole L. Crumley
Left Coast Press, 2007
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Sage, Andrew P.
System identification
Academic Press , 1971
 Buku Teks SO
Dorfman, Robert
The price system
Prentice-Hall of India, 1970
 Buku Teks
Jackson, Michael
System development
Prentice-Hall, 1983
 Buku Teks SO
Haveman, Robert H.
The market system
John Wiley, 1970
 Buku Teks