Friedland, E. L. (1977). Gates of power: In historical-critical perspective.
Cita Chicago (17th ed.)Friedland, Eric L. Gates of Power: In Historical-critical Perspective. 1977.
Cita MLA (8th ed.)Friedland, Eric L. Gates of Power: In Historical-critical Perspective. 1977.
Atenció: Aquestes cites poden no estar 100% correctes.