APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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