(美)Robert S.Fortner著 (美)Robert F.Bruner著 (美)Robert L.Norton原著 (美)Robert C.Martin著 (美)Robert F. Weaver著 (美)Robert L.Mott著 (美)Robert S.Feldman著 (美) Robert W. Duffner著 (美)Robert W.Hornbecka著 (美) Robert S.Schechter著
