APA (7th ed.) Citation

Eysenck, H. J. (1990). Know your own I.Q. / H. J. Eysenck. Penguin.

Chicago Style (17th ed.) Citation

Eysenck, H. J. Know Your Own I.Q. / H. J. Eysenck. Harmondsworth: Penguin, 1990.

MLA (9th ed.) Citation

Eysenck, H. J. Know Your Own I.Q. / H. J. Eysenck. Penguin, 1990.

Warning: These citations may not always be 100% accurate.