可能是个人，委员会或者直接写＂To Whom it May Concern＂。同时，确定一下推荐信应该和申请文件一起发还是单独发到招生办公室里。
如果你的推荐信是要给某一个人的，你应该加上称呼，例如dear dr. smith， dear mr. jones，等等。如果你的推荐信非常general，你在称呼的地方写to whom it may concern 或者不写称呼也可以。
主要内容叙述清楚后，还应该加一个简短的总结。总结部分应该再简述一下你为什么要推荐这个人。可以写上i highly recommend the person，i recommend the person without reservation 或者其他类似的话。
（tel number ，mailing address）
It is my pleasure to write this recommendation letter for my intelligent student， Yadi Wang. She is not only diligent but also good moral in our school. I will be very glad if my recommendation can help your evaluation of her capability.
I am the principle of the Zhengzhou 19th High School， which is a key high school in Henan province .In recent years， the 100 percent graduates from our school have been enrolled by university， and in addition， 80% graduates in our school have been recruited by national key university. I got to know her as a student of our school. She has been keeping a good balance between the arts and sciences， gaining high grades in each of them. Because of her diligent studying， she was titled several times “exemplary student” “excellent student cadres” “various abilities in a major”. More importantly， she owns the industriousness and inquisitiveness in learning， and an unusual ability of abstract and analytical thinking and in-depth exploration of knowledge. Due to her outstanding performance in studying， in every semester， her ranking grade never fell down below top 5 in her grade.
At the same time， in the social field， she manifests her powerful leader and organization capacity. Presently， these positions， she has been taking in charge of in our school， the monitor of her class， the director of the youth volunteer of environmental protection association. Moreover， she has various hobbies for example， playing the piano and Chinese calligraphy. As an editor in our school magazine， her peculiar points of view， fine style of writing， sense of humor often compose an excellent article. She has issued many excellent essays in school magazine. Her remarkable talent was appreciated by her teachers and schoolmates. Especially， in May， 2008， she won the title of Excellent Work in Zhengzhou 15th Guanghua Cup Calligraphy Competition. This contest adequately shows her talent in art. Otherwise， she took actively part in all kinds of the social activities in her vacation， such as offering care to the olds in old people’s home， and leading various kinds of community service as a youth volunteer for propagating the theory of environmental protection in the street and cleaning the mother river of this city and etc. All these activities constantly improve her social practice ability.
Finally， I honestly recommend her to you， with the hope that she can get the best chance to develop her enthusiasm as well as talents in your first-class university as to make her internationalization intellectual. I will highly appreciate your favorable consideration of her application. Please feel free to contact me if there’s any further information you need.
April 25， 2010
Zhengzhou 19th High School