Phillippakis, A. (1986). Structural cobol (3rd.). Mc Graw Hill.
Lua i Stíl Chicago (17ú heag.)Phillippakis, A. Structural Cobol. 3rd. New York: Mc Graw Hill, 1986.
Lua MLA (9ú heag.)Phillippakis, A. Structural Cobol. 3rd. Mc Graw Hill, 1986.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.