JONES, E. (1992). Paradox 4 made easy. Osborne McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)JONES, Edward. Paradox 4 Made Easy. Berkeley: Osborne McGraw-Hill, 1992.
Lua MLA (9ú heag.)JONES, Edward. Paradox 4 Made Easy. Osborne McGraw-Hill, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.