Luhmann, N. (2002). Risk: A sociological theory. Aldine Transaction.
Lua i Stíl Chicago (17ú heag.)Luhmann, Niklas. Risk: A Sociological Theory. New Brunswick, N.J: Aldine Transaction, 2002.
Lua MLA (9ú heag.)Luhmann, Niklas. Risk: A Sociological Theory. Aldine Transaction, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.