Beil, Donald H.
File processing with COBOL: with two major case studies
Reston, 1981
 Buku Teks
Seidel, Kenneth P.
Cobol
Goodyear , 1971
 Buku Teks
Philippakis, Andreas S.
Information systems through COBOL
McGraw-Hill, 1974
 Buku Teks
Ullman, Jeffrey D., 1942-
Principles of database and knowledge-base systems: vol.II: the new technologies
Computer Science Press , 1989
 Buku Teks
Dock, V. Thomas
Cobol: American national standard
Reston Publishing, 1973
 Buku Teks