黍离
除了语言类系(比如中文系、日语系),建议都用英文的。这个最好不要用范文。内容上要写老师怎么认识你的,由跟你接触的过程中,哪几件事给他留下了深刻印象,这几件事证明你适合做研究,做人也不错。给个开头结尾供你参考:To whom it may concern,..................I highly and without reservationrecommend him to your reputable graate program. Your favorable considerationof his application would be most appreciated. If you have questions regardingto this recommendation, please do not hesitate to contact me. Sincerely yours,XXX