Orwant, J. (1998). Perl 5 interactive course certified edition. Waite Group Press.
Lua i Stíl Chicago (17ú heag.)Orwant, Jon. Perl 5 Interactive Course Certified Edition. Waite Group Press, 1998.
Lua MLA (8ú heag.)Orwant, Jon. Perl 5 Interactive Course Certified Edition. Waite Group Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.