Covey, Stephen R. Dr. The seven habits of highly effective people : restoring the character ethic / Stephen R. Covey - New York : Simon and Schuster, c1989 - 340 p. : gráfs., tablas ; 25 cm. Contenido de los capítulos ISBN: 0671663984 Subjects--Topical Terms: PSICOLOGIA INDIVIDUALCARACTERISTICAS INDIVIDUALES Subjects--Index Terms: EXITO Universal Decimal Class. No.: 005.962.13