Barna, G. (1992). The Barna report 1992-93: An annual survey of ... Regal books.
Lua i Stíl Chicago (17ú heag.)Barna, George. The Barna Report 1992-93: An Annual Survey of ... Ventura: Regal books, 1992.
Lua MLA (9ú heag.)Barna, George. The Barna Report 1992-93: An Annual Survey of ... Regal books, 1992.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.