Introduction to Early Church History: The First 500 Years

The First Christian Theologians: An Introduction to Theology in the Early Church (The Great Theologians)

An Introduction to Practical Systematic Theology: Reclaiming the Doctrine of the Early Church

The Apostolic Church Order: The Greek text edited and translated with an introduction and notes: 10 (Early Christian Studies)

Early History of the Reformed Church in Pennsylvania: By Daniel Miller, With Introduction by Prof. W. J, Hinke, D. D