(1992). Natural Version 2.2: Reference Data. Software AG.
Lua i Stíl Chicago (17ú heag.)Natural Version 2.2: Reference Data. Darmstadt: Software AG, 1992.
Lua MLA (8ú heag.)Natural Version 2.2: Reference Data. Software AG, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.