Gaya APA

Barrett, J. (2008). The Aptitude Test Workbook : Discover Your Potential and Improve Your Career Options with Practice Psychometric Test . London: Kogan Page.

Gaya MLA

Barrett, Jim. "The Aptitude Test Workbook : Discover Your Potential and Improve Your Career Options with Practice Psychometric Test". London: Kogan Page, 2008. Text.