Schühly, G., & Mueller, U. (1997). Secularization in Eastern and Western Europe Results from the ISSP 1991 Survey on Religion in 10 West and East European Nations.
Lua i Stíl Chicago (17ú heag.)Schühly, Günther, agus Ulrich Mueller. Secularization in Eastern and Western Europe Results from the ISSP 1991 Survey on Religion in 10 West and East European Nations. Mannheim, 1997.
Lua MLA (8ú heag.)Schühly, Günther, agus Ulrich Mueller. Secularization in Eastern and Western Europe Results from the ISSP 1991 Survey on Religion in 10 West and East European Nations. 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.