The musical dialogue : thoughts on Monteverdi, Bach, and Mozart
  MLA
  Harnoncourt, Nikolaus, Mary O'Nelya, and Reinhard G Pauly. The Musical Dialogue : Thoughts On Monteverdi, Bach, and Mozart. Portland, Or.: Amadeus Press, 1989.
  APA
  Harnoncourt, N., O'Nelya, M., & Pauly, R. G. (1989). The musical dialogue : thoughts on Monteverdi, Bach, and Mozart. Portland, Or.: Amadeus Press.
  Chicago
  Harnoncourt, Nikolaus, The Musical Dialogue: Thoughts On Monteverdi, Bach, and Mozart. Translated by Mary O'Nelya. Edited by Reinhard G Pauly.  Portland, Or.: Amadeus Press, 1989.