EDWARD, J. (1992). Paradox 4 Made Easy. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)EDWARD, JONES. Paradox 4 Made Easy. McGraw-Hill, 1992.
Lua MLA (8ú heag.)EDWARD, JONES. Paradox 4 Made Easy. McGraw-Hill, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.