Jonas, H. (1959). The practical uses of theory: By Hans Jonas.
Lua i Stíl Chicago (17ú heag.)Jonas, Hans. The Practical Uses of Theory: By Hans Jonas. New York, 1959.
Lua MLA (8ú heag.)Jonas, Hans. The Practical Uses of Theory: By Hans Jonas. 1959.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.