Christensen, C. M. (2012). HOW WILL YOU MEASURE YOUR LIFE? HARPER COLLINS PUB.,UK.
Cita Chicago (17th ed.)Christensen, Clayton M. HOW WILL YOU MEASURE YOUR LIFE? HARPER COLLINS PUB.,UK, 2012.
Cita MLA (9th ed.)Christensen, Clayton M. HOW WILL YOU MEASURE YOUR LIFE? HARPER COLLINS PUB.,UK, 2012.
Atenció: Aquestes cites poden no estar 100% correctes.