Jelaskan Rujukan dari Nat King Cole dalam bahasa melayu

Bill Dobbins and Richard Wang. "Cole, Nat 'King'." Grove Music Online. Oxford Music Online. Oxford University Press. Web. 28 Sep. 2016.

Pelote, Vincent. "Book Reviews: "Unforgettable: The Life and Mystique of Nat King Cole," by Leslie Gourse." Notes: Quarterly Journal of the Music Library Association, vol. 49, no. 3, 1993., pp. 1073–1074,