Shepherd, John; Horn, David; Laing, Dave, eds. (2003). "Programming". Continuum Encyclopedia of Popular Music of the World. p. 499. ISBN9781501329234.
Margaret A., ed. (2013). "Radio Entertainment". History of the Mass Media in the United States: An Encyclopedia. p. 564. ISBN9781135917494. Archived from the original on 24 March 2022. Retrieved 4 December 2021.
Shepherd, John; Horn, David; Laing, Dave, eds. (2003). "Playlist". Continuum Encyclopedia of Popular Music of the World. p. 499. ISBN9781501329234.
"7.3 Radio Station Formats". The University of Minnesota Libraries. 1 May 2019. Archived from the original on 28 November 2020. Retrieved 16 December 2020.
web.archive.org
Margaret A., ed. (2013). "Radio Entertainment". History of the Mass Media in the United States: An Encyclopedia. p. 564. ISBN9781135917494. Archived from the original on 24 March 2022. Retrieved 4 December 2021.
"7.3 Radio Station Formats". The University of Minnesota Libraries. 1 May 2019. Archived from the original on 28 November 2020. Retrieved 16 December 2020.