Friedland, E. L. (1977). Gates of power: In historical-critical perspective.
Lua i Stíl Chicago (17ú heag.)Friedland, Eric L. Gates of Power: In Historical-critical Perspective. 1977.
Lua MLA (8ú heag.)Friedland, Eric L. Gates of Power: In Historical-critical Perspective. 1977.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.