Hoffer, M. M. Symposium on Orthopedic surgery in the mentally retarded.
芝加哥风格引文Hoffer, M. Mark. Symposium on Orthopedic Surgery in the Mentally Retarded.
MLA引文Hoffer, M. Mark. Symposium on Orthopedic Surgery in the Mentally Retarded.
警告：这些引文格式不一定是100％准确.