APA (7th ed.) Citation

Armstrong, J. (2005). The secret power of beauty / John Armstrong. Penguin.

Chicago Style (17th ed.) Citation

Armstrong, John. The Secret Power of Beauty / John Armstrong. London: Penguin, 2005.

MLA (9th ed.) Citation

Armstrong, John. The Secret Power of Beauty / John Armstrong. Penguin, 2005.

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