クララ・ウォード
Boyer, Horace Clarence, How Sweet the Sound: The Golden Age of Gospel Elliott and Clark, 1995, ISBN 0-252-06877-7.
Anthony Heilbut The Gospel Sound: Good News and Bad Times Limelight Editions, 1997, ISBN 0-87910-034-6.
Salvatore, Nick, Singing in a Strange Land: C. L. Franklin, the Black Church, and the Transformation of America, Little Brown, 2005, Hardcover ISBN 0-316-16037-7.