APA (7th ed.) Citation
Wilson, J. H., & Clark, J. R. (1997). Economics. National Textbook company.
Chicago Style (17th ed.) Citation
Wilson, J. Holton, and J. R. Clark. Economics. Cincinnati: National Textbook company, 1997.
MLA (9th ed.) Citation
Wilson, J. Holton, and J. R. Clark. Economics. National Textbook company, 1997.
Warning: These citations may not always be 100% accurate.