Allen, DavidAttali, JacquesBarbero, ConchaBogle, John C.Brand, UlrichCarnegie, DaleCovey, SeanCovey, Stephen M. R.Covey, Stephen R.Dante AlighieriDuch, LluÃsHill, NapoleonHoracio VerbitskyJericó, PilarJorge Fernández DÃazKiyosaki, Robert T.Le Goff, JacquesLuis ChiozzaMarcela SerranoSchroeder, AliceShua, Ana MarÃaSin AutorStengel, JimTim HarfordVariosVarios autoresVV. AA.Zeldin, Theodore