SPENCE RICK. (1989). CLIPPER PROGRAMMING GUIDE. BPB PUBLICATIONS.
Lua i Stíl Chicago (17ú heag.)SPENCE RICK. CLIPPER PROGRAMMING GUIDE. NEW DELHI: BPB PUBLICATIONS, 1989.
Lua MLA (9ú heag.)SPENCE RICK. CLIPPER PROGRAMMING GUIDE. BPB PUBLICATIONS, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.