Friedrich Engels, Karl Marx
Green Jeff
Rhonda Byrne
Reid Daniel
Lonely Planet
Andre Van Lysebeth
Roberto Arlt
Adam Hochschild
Pablo Victoria
Vernet Juan
Joseph O'connor
Revel Jean François, Matthieu Ricard
Marianne Williamson
George Orwell
Marin Dolores
Paul Preciado
Louise L. Hay
Betty Edwards
Sergio Del Molino
Debbie Ford, Marianne Williamson, Deepak Chopra
Miguel Ruiz
Miedaner Talane
Gertrud Hirschi
Maria Eugenia Fernandez Fraile
Mika Etchebehere
Perez Reverte Arturo Y Carlot
Bartolome Bennassar
Barry Buzan, Tony Buzan
Marco Cicala
Josep M. Colomer
Constanza Cavallero
Schmidl Ulrico
Cayetano Cordova Iturburu