Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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