这个英文怎么说啊？？？？

记得听VOA是 a secret official said ...
以下则是摘自金山，供参考 不过读起来挺怪的
an unidentified source 不愿透露姓名的人士
According to an anonymous source 据一位不愿透露姓名的消息灵通人士说……
"This is better than any drama serial the TV station can come up with," one professional woman who asked not to be named said.
一位不愿意透露姓名的职业女性说："他们的故事比电视台里播放的任何电视剧都要感人。"
a nameless source 一未透露姓名者
Those who claim to have see spirit are reluctant to reveal their name.
那些自称曾看见过鬼魂的人不愿意披露他们的姓名。

an anonymous source

from an unidentified .....

One man who asked not to be named....

the informant who is unwilling to give his name