APA (7th ed.) Citation

Hercun, D. (2004). IQ challenge: The fun way to sharpen your mental skills. Greenwich Editions.

Chicago Style (17th ed.) Citation

Hercun, Deborah. IQ Challenge: The Fun Way to Sharpen Your Mental Skills. London: Greenwich Editions, 2004.

MLA (9th ed.) Citation

Hercun, Deborah. IQ Challenge: The Fun Way to Sharpen Your Mental Skills. Greenwich Editions, 2004.

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