APA
Worth T., . (1986). Cobol for Beginners. : Prentice-Hall Inc.
Chicago
Worth Thomas, . 1986. Cobol for Beginners. : Prentice-Hall Inc.
Harvard
Worth T., . (1986). Cobol for Beginners. : Prentice-Hall Inc.
MLA
Worth Thomas, . Cobol for Beginners. : Prentice-Hall Inc. 1986.
