APA-referens (7:e uppl.)

O'Regan, T. (2005). And there was a great calm: Diptych for string orchestra and upper voice chorus (Vocal score.). Novello & Company.

Chicago-referens (17:e uppl.)

O'Regan, Tarik. And There Was a Great Calm: Diptych for String Orchestra and Upper Voice Chorus. Vocal score. [London, England]: Novello & Company, 2005.

MLA-referens (9:e uppl.)

O'Regan, Tarik. And There Was a Great Calm: Diptych for String Orchestra and Upper Voice Chorus. Vocal score. Novello & Company, 2005.