Sordillo, D. A. (1978). The programmer's ANSI COBOL reference manual. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Sordillo, Donald A. The Programmer's ANSI COBOL Reference Manual. Englewood Cliffs, N.J.: Prentice-Hall, 1978.
Lua MLA (9ú heag.)Sordillo, Donald A. The Programmer's ANSI COBOL Reference Manual. Prentice-Hall, 1978.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.