APA (7th ed.) Citation

Koch Richard. (2013). The star principle: How it can make you rich. Pioneer House.

Chicago Style (17th ed.) Citation

Koch Richard. The Star Principle: How It Can Make You Rich. London: Pioneer House, 2013.

MLA (9th ed.) Citation

Koch Richard. The Star Principle: How It Can Make You Rich. Pioneer House, 2013.

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