APA (7th ed.) Citation

Friedman. (2005). The secret histories: Hidden truths that challenged the past and changed the world. Picador.

Chicago Style (17th ed.) Citation

Friedman. The Secret Histories: Hidden Truths That Challenged the Past and Changed the World. New York: Picador, 2005.

MLA (9th ed.) Citation

Friedman. The Secret Histories: Hidden Truths That Challenged the Past and Changed the World. Picador, 2005.

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