Perrin, T. (1988). Programming laser printers: HP and compatibles. Management Information Source.
Lua i Stíl Chicago (17ú heag.)Perrin, Tim. Programming Laser Printers: HP and Compatibles. Portland, Or: Management Information Source, 1988.
Lua MLA (9ú heag.)Perrin, Tim. Programming Laser Printers: HP and Compatibles. Management Information Source, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.