クワイエット・エレガンス
Bogdanov,Vladimir; Bush, John; Woodstra, Chris, Erlewine, Stephen Thomas (Eds) (2005) All Music Guide To Soul, Backbeat Books, San Francisco. ISBN 0-87930-744-7
Tee, Ralph (1991) Who’s Who In Soul Music, Weidenfeld & Nicolson, London. ISBN 0-297-81081-2