The reference letter varies depending on what it is for and to whom it is addressed. Some genersl guidelines can be found at: http://www.applyweb.com/apply/mcgreg/cr_recommendation.pdf http://www.ltsc.ucsb.edu/urca/ucdc/ucdcappinfo2.html http://www.physast.uga.edu/reu/ref_letter_inf.html If this is for admission to a graduate program check with the school, often they have a form to fill out or ask for specific types and sources of refernces. (BTW- I found the above and many more using a two minute search on Google, an important part of graduate school, especially at doctorate level is research. This is not meant as a flame, but rather a piece of constuctive information.)
