por Maddux, Robert B [autor] | Carter B., Teresa [traductor] | Maddux, Robert B. Succesful negotiation.
por Maddux, Robert B [autor] | Tejera, Héctor G [traductor] | Maddux, Robert B. Delegating to achieve results.
por Maddux, Robert B [autor] | Maddux, Robert B. Quality inteviewing.