Duverger, M., & Magoner. (1972). Party politics and pressure groups: A comparative introduction. Nelson.
Cita Chicago (17th ed.)Duverger, Maurice, i Magoner. Party Politics and Pressure Groups: A Comparative Introduction. London: Nelson, 1972.
Cita MLA (9th ed.)Duverger, Maurice, i Magoner. Party Politics and Pressure Groups: A Comparative Introduction. Nelson, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.