4 sentences

1. 他们的消息来源是谁？

   tā​men de xiāo​xi lái​yuán shì shéi?

   Who are their sources?

   Source: OpenSubtitles

2. 我还有其他消息来源。

   wǒ hái yǒu qí​tā xiāo​xi lái​yuán.

   I have other sources.

   Source: OpenSubtitles

3. 这个消息来源非常可靠。

   zhè gè xiāo​xi lái​yuán fēi​cháng kě​kào.

   This source of information is very reliable.

   Source: Dong Chinese Dictionary

4. 我不会透露我的消息来源。

   wǒ bù huì tòu​lù wǒ de xiāo​xi lái​yuán.

   I'm not revealing my sources.

   Source: OpenSubtitles