The Art, to Listen: a Musical Analysis of the Composition IN FRIENDSHIP
  MLA
  Stockhausen, Karlheinz, and John McGuire. The Art, to Listen: a Musical Analysis of the Composition In Friendship. 2nd ed. Kürten: Stockhausen-verlag, 2015.
  APA
  Stockhausen, K., & McGuire, J. (2015). The Art, to Listen: a Musical Analysis of the Composition IN FRIENDSHIP. 2nd ed. Kürten: Stockhausen-verlag.
  Chicago
  Stockhausen, Karlheinz The Art, to Listen: a Musical Analysis of the Composition IN FRIENDSHIP. Translated by John McGuire.  2nd ed. Kürten: Stockhausen-verlag, 2015.