第7版 http://www.amazon.com/exec/obidos/t...f=sr_1_9/103-3019122-4684655?v=glance&s=books 所有版本 http://www.amazon.com/exec/obidos/search-handle-form/104-4426898-6328730 作者个人主页 http://www.stanford.edu/~wfsharpe/