APA (7th ed.) Citation

Eysenck, H. (1996). Check Your Own I.Q. Penguin Books.

Chicago Style (17th ed.) Citation

Eysenck, H.J. Check Your Own I.Q. New York: Penguin Books, 1996.

MLA (9th ed.) Citation

Eysenck, H.J. Check Your Own I.Q. Penguin Books, 1996.