APA (7th ed.) Citation

Carr, A. (2011). Allen Carr's easy way to stop smoking (US edition.). Clarity Marketing.

Chicago Style (17th ed.) Citation

Carr, Allen. Allen Carr's Easy Way to Stop Smoking. US edition. New York, NY: Clarity Marketing, 2011.

MLA (8th ed.) Citation

Carr, Allen. Allen Carr's Easy Way to Stop Smoking. US edition. Clarity Marketing, 2011.

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