APA (7th ed.) Citation

Harpool, J. D. (1978). Business data systems: A practical guide. Brown.

Chicago Style (17th ed.) Citation

Harpool, Jack D. Business Data Systems: A Practical Guide. Dubuque, Iowa: Brown, 1978.

MLA (9th ed.) Citation

Harpool, Jack D. Business Data Systems: A Practical Guide. Brown, 1978.