Las Habilidades Atencionales Básicas: Pilares Fundamentales de la Comunicación Efectiva
written by Allen E. Ivey, fl. 1980, Mary Bradford Ivey, fl. 1982, Norma Gluckstern Packard, fl. 2000 and Carlos Zalaquett; presented by Allen E. Ivey, fl. 1980, Mary Bradford Ivey, fl. 1982, Norma Gluckstern Packard, fl. 2000 and Carlos Zalaquett; produced by Microtraining Associates (Alexandria, VA: Alexander Street, 2009), 1 hour 54 mins
