Litecky, C. (1987). Structural cobol. Mc Graw Hill.
Lua i Stíl Chicago (17ú heag.)Litecky, C. Structural Cobol. New York: Mc Graw Hill, 1987.
Lua MLA (9ú heag.)Litecky, C. Structural Cobol. Mc Graw Hill, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.