APA (7th ed.) Citation

WILLOUGHBY, T. C., & Senn, J. (1975). Business system. The Association for System Management.

Chicago Style (17th ed.) Citation

WILLOUGHBY, Theodore C., and James Senn. Business System. Cleveland, Ohio: The Association for System Management, 1975.

MLA (8th ed.) Citation

WILLOUGHBY, Theodore C., and James Senn. Business System. The Association for System Management, 1975.

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