A Brief Examination of Exclusive Psalmody: Article by Brian Schwertley explaining and advocating exclusive psalmody for the Reformed Presbyterian church.
Exclusive Psalmody Homepage: 10 books, articles, sermons, tracts, including the Bay Psalm Book Preface, in support: Reformed Presbyterian Perspective.
Psalm Singing in Scripture and History: Defends the use of exclusive Psalmody in public worship
The Westminster Directory for Worship and the Lining of the Psalms: Repudiates exclusive use of "lined-out" psalmody. (at First Presbyterian Church, Rowlett: Blue Banner Web Site)