APA (7th ed.) Citation
Barrett, J., & Williams, G. (1981). Test your own job aptitude: Exploring your career potential. Penguin.
Chicago Style (17th ed.) Citation
Barrett, James, and Geoffrey Williams. Test Your Own Job Aptitude: Exploring Your Career Potential. New York: Penguin, 1981.
MLA (9th ed.) Citation
Barrett, James, and Geoffrey Williams. Test Your Own Job Aptitude: Exploring Your Career Potential. Penguin, 1981.
Warning: These citations may not always be 100% accurate.