How do I import music from Home Shared Libraries? iTunes 12

I can see the music and videos on my parent's iTunes account when using my computer, but I can't import them onto my computer so that it shows in my music library when I'm looking at my music under the "On this Computer" tab. Even if it was a CD that my parents imported to their computer I cannot import it onto mine (although I can see it and play it when I am within their wifi network). I want to be able to import their music so that I can listen to it even when I have no internet connection. In short, how do I import music from home shared libraries?