APA (7th ed.) Citation

Butler & Pirie. (1983). Test your IQ. Pan Books.

Chicago Style (17th ed.) Citation

Butler and Pirie. Test Your IQ. London: Pan Books, 1983.

MLA (8th ed.) Citation

Butler and Pirie. Test Your IQ. Pan Books, 1983.

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