HAKALA, D. (1995). Modems Made Easy: The Basics And Beyond David Hakala. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)HAKALA, David. Modems Made Easy: The Basics And Beyond David Hakala. McGraw-Hill, 1995.
Lua MLA (8ú heag.)HAKALA, David. Modems Made Easy: The Basics And Beyond David Hakala. McGraw-Hill, 1995.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.