Aron, ElaineAron, Elaine N.Carnegie, DaleCirillo, FrancescoCollins, MelDyer, Wayne W.Ellis, AlbertGeorge, JimGladwell, MalcolmKATZENBACH, JOHNL. Ronald HubbardMarian Rojas EstapéMark WolynnMax, LucadoMaxwell, John C.Robert FisherRojas Estapé, MariánStamateas, BernardoTiago BrunetVidaViktor Frankl