I have a letter of reference here from my employer there.

我这里有一封我雇主的推荐函。

Miss Ma has asked me to write a letter of reference on her behalf.......

马小姐要求本人为其写推荐信……推荐信的范式(长春翻译金伦翻译)。

Remember, it is a letter of reference and not a letter of recommendation.

请记住，雇主信是一种工作介绍证明，而不是一种推荐信。

That same professor wrote a letter of reference for my transfer to a UC school, and then again for my graduate school applications.

也正是这位教授给我写了推荐信让我转去UC求学，后来我读研究生的时候也是这位导师帮我推荐。

The only way to strengthen the quality of librarians, strengthened within the letter of reference services, in order to adapt to the diverse needs of modern readers.

只有这样，加强了素质的馆员，加强了内函的参考咨询服务，才能适应现代读者的多样化需求。