APA (7th ed.) Citation

Godefroy, C. H., & Barrat, S. (1990). The power talk system: How to communicate effectively. Piatkus.

Chicago Style (17th ed.) Citation

Godefroy, Christian H., and Stephanie Barrat. The Power Talk System: How to Communicate Effectively. London: Piatkus, 1990.

MLA (9th ed.) Citation

Godefroy, Christian H., and Stephanie Barrat. The Power Talk System: How to Communicate Effectively. Piatkus, 1990.

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