Doblelli Rolf. (2013). Art of Thinking Clearly. Sceptre.
Lua i Stíl Chicago (17ú heag.)Doblelli Rolf. Art of Thinking Clearly. UK: Sceptre, 2013.
Lua MLA (9ú heag.)Doblelli Rolf. Art of Thinking Clearly. Sceptre, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.