↑ Chan, Shun-hing and Beatrice Leung (2003). Changing Church and State Relations in Hong Kong, 1950-2000. Hong Kong University Press, ms 12. ISBN 9622096123. "These oft-quoted clauses of Jefferson's theory of a 'wall of separation' reflect two significant foundations of Church-State relations in the US. Firstly, the separation of Church and State stands as a constitutional principle that promotes democracy and protects the religious freedom of all Americans equally. Secondly, this principle emerges as a unique American contribution to political theory (Feldman 1997, 4)."
