Sondheim, S., Lapine, J., & Tarchetti, I. U. (1994). Passion: A musical. Theatre Communications Group.
Lua i Stíl Chicago (17ú heag.)Sondheim, Stephen, James Lapine, agus Iginio Ugo Tarchetti. Passion: A Musical. New York, NY: Theatre Communications Group, 1994.
Lua MLA (9ú heag.)Sondheim, Stephen, et al. Passion: A Musical. Theatre Communications Group, 1994.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.