APA Style

George Pratt, Ph.D., and Peter Lambrou, Ph.D.. (2013). Code to Joy: the four-step solution to unlocking your natural state of happiness . New York: HarperCollins.

Chicago Style

George Pratt, Ph.D., and Peter Lambrou, Ph.D.. Code to Joy: the four-step solution to unlocking your natural state of happiness. New York: HarperCollins, 2013. BOOKS.

MLA Style

George Pratt, Ph.D., and Peter Lambrou, Ph.D.. Code to Joy: the four-step solution to unlocking your natural state of happiness. New York: HarperCollins, 2013. BOOKS.

Turabian Style

George Pratt, Ph.D., and Peter Lambrou, Ph.D.. Code to Joy: the four-step solution to unlocking your natural state of happiness. New York: HarperCollins, 2013. BOOKS.