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.