Heidelberg and Westminster: Two Reformed Catechisms
- A comparison of the Heidelberg Catechism with the Westminster Larger and Shorter Catechisms.
- http://www.opc.org/new_horizons/NH05/HeidelbergWestminster.html

Book of Confessions
- A book of the creeds, confessions and catechisms accepted by the Presbyterian Church (U.S.A.)
- http://www.pcusa.org/oga/publications/boc.pdf

Christian Creeds, Confessions, and Catechisms
- A reference archive of creeds and confessions of the Christian Faith from all periods of Church History.
- http://www.cresourcei.org/creeds.html

The Doctrine of the Church in Reformed Confessions
- A Scriptural and historical survey of Reformed confessions.
- http://spindleworks.com/library/faber/010_thechurch.htm

A Short History of Creeds and Confessions
- A general history covering the ancient creeds of Christendom, confessions of the Lutheran Church and the Reformed Churches.
- http://www.bible-researcher.com/confessions.html