Sonja Kristina (born 14 April 1949, Brentwood, Essex, England) is a British songwriter, musician and actor, best known for starring in the seminal 1960s musical, Hair, and for being the female lead vocalist of the 1970s progressive rock band, Curved Air.
- ^ The Encyclopedia of Popular Music. Colin Larkin. Omnibus Press, 27 May 2011
- ^ Citizens of Hope and Glory: The Story of Progressive Rock, Stephen Lambe Amberley, Publishing Limited, 30 January 2012, ISBN 978-1445616834
- ^ Rocking the Classics: English Progressive Rock and the Counterculture, Edward Macan, Oxford University Press, 1997, ISBN 978-0195098884