Aiken, H. D. (1956). The age of ideology: The 19th century philosophers. New American Library.
Lua i Stíl Chicago (17ú heag.)Aiken, Henry David. The Age of Ideology: The 19th Century Philosophers. New York: New American Library, 1956.
Lua MLA (8ú heag.)Aiken, Henry David. The Age of Ideology: The 19th Century Philosophers. New American Library, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.