APA (7th ed.) Citation

Armstrong, R. M. (1973). Modular programming in COBOL. A Wiley-Interscience Publication.

Chicago Style (17th ed.) Citation

Armstrong, Russell M. Modular Programming in COBOL. New York: A Wiley-Interscience Publication, 1973.

MLA (9th ed.) Citation

Armstrong, Russell M. Modular Programming in COBOL. A Wiley-Interscience Publication, 1973.

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