APA (7th ed.) Citation

Barrett, J., & Willams, G. (2002). Test your own aptitude. Kogan Page.

Chicago Style (17th ed.) Citation

Barrett, Jim, and Geoff Willams. Test Your Own Aptitude. New Delhi: Kogan Page, 2002.

MLA (8th ed.) Citation

Barrett, Jim, and Geoff Willams. Test Your Own Aptitude. Kogan Page, 2002.