APA (7th ed.) Citation

CollopylhDavid M. Introduction to cobol: A guide to modular structured programming.

Chicago Style (17th ed.) Citation

CollopylhDavid M. Introduction to Cobol: A Guide to Modular Structured Programming. New JerseylbPrentice halllc2000.

MLA (9th ed.) Citation

CollopylhDavid M. Introduction to Cobol: A Guide to Modular Structured Programming.

Warning: These citations may not always be 100% accurate.