(en) Steve Waksman, This Ain't the Summer of Love : Conflict and Crossover in Heavy Metal and Punk, Berkeley et Los Angeles, University of California Press, (ISBN978-0-52094-388-9, lire en ligne), p. 61.
(en) Michael Hicks, Sixties Rock : Garage, Psychedelic, and Other Satisfactions, University of Illinois Press, (ISBN978-0-25206-915-4, lire en ligne), p. 37, 134.
(en) Jim DeRogatis, Turn on Your Mind : Four Decades of Great Psychedelic Rock, Milwaukee, Hal Leonard, (ISBN978-0-63405-548-5, lire en ligne), p. 64.
(en) Stuart Rosenberg, Rock and Roll and the American Landscape : The Birth of an Industry and the Expansion of the Popular Culture, 1955-1969, New York, Bloomington, iUniverse, (ISBN978-1-44016-458-3, lire en ligne), p. 113.
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(en) Ray B. Browne et Pat Browne, The Guide to United States Popular Culture, Madison, Bowling Green State University Popular Press, (ISBN978-0-87972-821-2, lire en ligne), p. 8.