Employer references 指的是工作经历还是雇主推荐信？

Employer references Applicants should attach employer references to their application. These should be on company letterhead and include the job title, a brief job description and precise dates of employment. They should also clearly state whether employment was full or part-time along with demonstrated levels of competence with any computer languages, the various types of hardware and software used and the extent of involvement with any major projects. Letters of appointment or contracts are not accepted.
按这上面说，应该是工作经历，需要写得这么详细么？公证处的人说，工作经历证明写得
很简单的。
大侠们当初是怎么写的？
联系人：
联系方式：