(美)Richard A. Poisel著 (美) Richard A. Poisel著 (美) Richard J. Fowler著 (美) Richard P. Hodges著 (美)Richard P. Tritter著 (美) Richard G. Wiley著 Richard A. Poisel (美) Richard C. Detmer著 (美)Richard C. Leinecker著 (美)Richard A. Spears著