Economy of the Covenants
Book 1 | Book 2 | Book 3 | Book 4
On the Character of a True Theologian
Published in The Biblical Repertory on p. 158, and p. 162 in your PDF reader.
The Efficacy and Utility of Baptism in Elect Infants of Covenant Parents (translation and introduction by Dr. J. Mark Beach)
J. V. Fesko “Calvin and Witsius on the Mosaic Covenant” from The Law is Not of Faith
R.A. Muller “The Covenant of Works and the Stability of Divine Law in Seventeenth Century Reformed Orthodoxy: A Study in the Theology of Herman Witsius and Wilhemus À Brakel” Calvin Theological Journal (1994)
Witsius Resources at the Post-Reformation Digital Library Page