Lua APA (7ú heag.)
Vorreux, D. (1979). A franciscan symbol, the tau: History, theology and iconography. Franciscan Herald Press.
Lua i Stíl Chicago (17ú heag.)
Vorreux, Damien. A Franciscan Symbol, the Tau: History, Theology and Iconography. Chicago (IL): Franciscan Herald Press, 1979.
Lua MLA (9ú heag.)
Vorreux, Damien. A Franciscan Symbol, the Tau: History, Theology and Iconography. Franciscan Herald Press, 1979.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.