Archdiocese of Singapore: http://www.veritas.org.sg/

Church of Our Lady Star of the Sea: http://www.olss.sg/

Vatican - The Holy See: http://www.vatican.va/

Office of Readings: http://www.universalis.com/cgi-bin/display/readings.htm

Catholic Online: http://www.catholic.org

Catechism of the Catholic Church: http://www.scborromeo.org/ccc/ccc_toc2.htm