How can express a sentence containing relative pronoun in Chinese? I wanted to say "Then I no longer have to listen to the native speaker whose pronunciation I can refer to", but then I realized that I had no idea how to express that sentence in Chinese.

How should I translate this in Chinese? I couldn't make up a sentence better than this" 那么, 我不必听到外国人, 这个人的发音我可以参考. But this sentence sounds a little awkward to me, since it consists of two different clauses, while the English sentence doesn't. Is there any more adequate or sound way to convey this sentence in Chinese?
Actually,

我不用再去参考[那些][中文]母语人士的发音了

would also make sense, since "refer to pronunciation" implies that you would "listen to those native speakers".  

If you want to save all words in your sentence, you may translate the attributive clause like this:

我不必再听那些可用来参考的母语人士的发音了。