Colbert, D. A. (1968). Data processing concepts. McGraw-Hill Book Co., Inc.
Lua i Stíl Chicago (17ú heag.)Colbert, Douglas A. Data Processing Concepts. New York: McGraw-Hill Book Co., Inc, 1968.
Lua MLA (9ú heag.)Colbert, Douglas A. Data Processing Concepts. McGraw-Hill Book Co., Inc, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.