Gundissalinus, D., & Laumakis, J. A. (2002). The Procession of the world. Marquette University Press.
Lua i Stíl Chicago (17ú heag.)Gundissalinus, Dominicus, agus John A. Laumakis. The Procession of the World. Milwaukee, Wis.: Marquette University Press, 2002.
Lua MLA (9ú heag.)Gundissalinus, Dominicus, agus John A. Laumakis. The Procession of the World. Marquette University Press, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.