Smith, I. (2010). Happy: Simple steps to get the most out of life. St. Martin's Press.
Cita Chicago Style (17a ed.)Smith, Ian. Happy: Simple Steps to Get the Most Out of Life. New York: St. Martin's Press, 2010.
Cita MLA (8a ed.)Smith, Ian. Happy: Simple Steps to Get the Most Out of Life. St. Martin's Press, 2010.
Precaución: Estas citas no son 100% exactas.