APA (7th ed.) Citation

Koch. (2010). The star principle: How it can make you rich. Piatkus.

Chicago Style (17th ed.) Citation

Koch. The Star Principle: How It Can Make You Rich. London: Piatkus, 2010.

MLA (8th ed.) Citation

Koch. The Star Principle: How It Can Make You Rich. Piatkus, 2010.

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