Eckstein, H. (1960). Pressure group politics: The case of the British Medical Association. Allen & Unwin.
Cita Chicago (17th ed.)Eckstein, Harry. Pressure Group Politics: The Case of the British Medical Association. London: Allen & Unwin, 1960.
Cita MLA (8th ed.)Eckstein, Harry. Pressure Group Politics: The Case of the British Medical Association. Allen & Unwin, 1960.
Atenció: Aquestes cites poden no estar 100% correctes.