Perkin, H. A. (1996). The third revolution: Professional elites in the modern world.
Chicago Style aipamenaPerkin, Harold; Author. The Third Revolution: Professional Elites in the Modern World. London, Routledge, 1996.
MLA aipamenaPerkin, Harold; Author. The Third Revolution: Professional Elites in the Modern World. 1996.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.