ProQuest Staff. "Popular Culture Timeline." Leading Issues Timelines 2009: n.p. SIRS Researcher. Web. 19 December 2009.
This source talks about what people in America were doing for entertainment in the twentieth century, and one of the topics that comes up very frequently throughout the timeline is music and people listening to records and the radio. It talks about things from the phonograph all the way up to the iPod. Although it is not the focus of the timeline, the music aspect is covered enough for me to gather enough information about how it was listened to and how really important it was to people and how important it still is.