Castles, F. G. (1967). Pressure groups and political culture: A comparative study. Routledge & K. Paul.
Chicago-viite (17. p.)Castles, Francis Geoffrey. Pressure Groups and Political Culture: A Comparative Study. London: Routledge & K. Paul, 1967.
MLA-viite (9. p.)Castles, Francis Geoffrey. Pressure Groups and Political Culture: A Comparative Study. Routledge & K. Paul, 1967.
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