APA (7th ed.) Citation

Lamb, W. (2009). I know this much is true / Wally Lamb. Harper.

Chicago Style (17th ed.) Citation

Lamb, Wally. I Know This Much Is True / Wally Lamb. London: Harper, 2009.

MLA (9th ed.) Citation

Lamb, Wally. I Know This Much Is True / Wally Lamb. Harper, 2009.

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