↑britannica.com: Rap, musical style in which rhythmic and/or rhyming speech is chanted ("rapped") to musical accompaniment. This backing music, which can include digital sampling (music and sounds extracted from other recordings), is also called hip-hop, the name used to refer to a broader cultural movement that includes rap, deejaying (turntable manipulation), graffiti painting, and break dancing.
↑Kugelberg, Johan (2007) (στα αγγλικά). Born in the Bronx. New York: Oxford University Press, σελ. 17. ISBN978-0-7893-1540-3.