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。
Try to get a letter of recommendation from each employment-related reference whom you know will give you good marks.
试着从你跟你工作相关，并且你认为会给你好评价的人那里得到推荐信。
A reference letter (or letter of recommendation) should be no longer than one page.
一封推荐信最好不要超过一页。
应用推荐