APA (7th ed.) Citation

GRAUER, R. T. (1991). Cobol: From micro to mainframe volume II. Prentice Hall.

Chicago Style (17th ed.) Citation

GRAUER, Robert T. Cobol: From Micro to Mainframe Volume II. London: Prentice Hall, 1991.

MLA (9th ed.) Citation

GRAUER, Robert T. Cobol: From Micro to Mainframe Volume II. Prentice Hall, 1991.