(美)Robert M. Silverstein[等]著 (美) Robert M. Silverstein ... [等] 著 (美)Robert C. Martin著 (美)Robert E.Walters等著 (美)Robert W. Sebesta 著 (美)Robert W. Sebesta著 (美)Robert C.Martin著 (美)Robert F. Weaver著 (美)Robert W.Sebesta著 (美)Robert L. Boylestad著