Secondary Sources ~ 1900s

The Westminster Directory edited with an introduction and notes by Leishman, Thomas (DPW)
Theology of the Westminster Symbols: A Commentary Historical Doctrinal Practical on the Confession of Faith and Catechisms and the Related Formularies of the Presbyterian Churches by Morris, Edward D. (WCF)
Westminster confession of faith; should it be changed by McLeod, James (WCF)