Tolong jelaskan mengenai Bacaan lebih lanjut dari Harley Earl

Gartman, David (1994), “Harley Earl and the Art and Color Section: The Birth of Styling at General Motors,” Design Issues vol. 10, no. 2, pages 3–26

Temple, David (2016), The Cars of Harley Earl, Forest Lake, MN, USA: CarTech Inc., .