APA (7th ed.) Citation

Paul Jenner. (2010). How to be happier (18th.). Teach Yourself.

Chicago Style (17th ed.) Citation

Paul Jenner. How to Be Happier. 18th. London: Teach Yourself, 2010.

MLA (9th ed.) Citation

Paul Jenner. How to Be Happier. 18th. Teach Yourself, 2010.

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