Mahood, H.R.
Pressure groups in American politics
Scribner, 1967
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Miller, Stephen
Special interest groups in American politics / Stephen Miller
Hindustan Publishing, 1985
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Edie, Carlene J.
Politics in Africa : a new beginning?
Wadsworth/Thomson Learning, 2003
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Quigley, Harold S.
The new Japan government and politics
University of Minnesota Press, 1956
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Groups in context : a new perspective on group dynamics
edited by Jonathon Gillette and Marion McCollom
Addison-Wesley, 1990
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