Perkin, H. (1996). The third revolution: Professional elites in the modern world. Routledge.
Lua i Stíl Chicago (17ú heag.)Perkin, Harold. The Third Revolution: Professional Elites in the Modern World. London [u.a.]: Routledge, 1996.
Lua MLA (8ú heag.)Perkin, Harold. The Third Revolution: Professional Elites in the Modern World. Routledge, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.