Rescher, N. (2006). Studies in value theory. Ontos Verlag.
Lua i Stíl Chicago (17ú heag.)Rescher, Nicholas. Studies in Value Theory. Frankfurt ; New Brunswick: Ontos Verlag, 2006.
Lua MLA (9ú heag.)Rescher, Nicholas. Studies in Value Theory. Ontos Verlag, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.