Somon, H. A. (1979). Models of thought. Yale University.
Lua i Stíl Chicago (17ú heag.)Somon, Herbert A. Models of Thought. New Haven: Yale University, 1979.
Lua MLA (9ú heag.)Somon, Herbert A. Models of Thought. Yale University, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.