Paul Hegarty et Martin Halliwell, Beyond and Before : Progressive Rock since the 1960s, Bloomsbury, , 328 p. (ISBN978-1-4411-1480-8, lire en ligne), p. 64
(en-GB) Joe Muggs, « The silliness ran deep in Gong, but they could groove like mothers, too », The Guardian, (ISSN0261-3077, lire en ligne, consulté le )
(en-GB) Joe Muggs, « The silliness ran deep in Gong, but they could groove like mothers, too », The Guardian, (ISSN0261-3077, lire en ligne, consulté le )
