APA (7th ed.) Citation

Willoughby & Senn. (1975). Business systems. Association for Systems Management.

Chicago Style (17th ed.) Citation

Willoughby and Senn. Business Systems. Cleveland: Association for Systems Management, 1975.

MLA (8th ed.) Citation

Willoughby and Senn. Business Systems. Association for Systems Management, 1975.

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