The airplay chart (also being referred to as Radio Songs since June 2009) tracks "the week's most popular songs across all genres, ranked by radio airplay audience impressions as measured by Nielsen BDS."
Hot 100 Airplay Edit
- Whitburn, Joel (2004). The Billboard Book of Top 40 Hits. ISBN 0-8230-7499-4.
- Whitburn, Joel (2009). Top Pop Singles (12th ed.). ISBN 0-89820-180-2.