<Li> Jump up ^ Morton, David (1976). The Traditional Music of Thailand, p. 21 . University of California Press . ISBN 0 - 520 - 01876 - 1 . </Li> <Li> Jump up ^ Morton (1964), p. 39 . </Li> <Li> Jump up ^ Campbell, Edward (2010). Boulez, Music and Philosophy, p. 211&213 . ISBN 978 - 0 - 521 - 86242 - 4 . </Li> <Li> Jump up ^ Evans, P. 1979, p469) The Music of Benjamin Britten . London, Dent . </Li>

Which of the following is a part of the definition of heterophony