Am I Making Myself Clear? Secrets of the World's Greatest Communicators Felber Terry Heftet / 2008 / Engelsk
leyenda del monje y el mercader Doce claves para vivir exitosamente Felber Terry Heftet / 2014 / Spansk
Legend of the Monk and the Merchant Twelve Keys to Successful Living Felber Terry Heftet / 2023 / Engelsk
