Oliver , E. (1986). Data processing (7th.). DP.
Lua i Stíl Chicago (17ú heag.)Oliver , E. Data Processing. 7th. Hampshire: DP, 1986.
Lua MLA (9ú heag.)Oliver , E. Data Processing. 7th. DP, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.