A. T. B. McGowan 
The New Reformed Book of Common Order [PDF ebook] 

A. T. B. Mc Gowan, formerly director of the Rutherford Centre for Reformed Theology, is emeritus professor of theology in the University of the Highlands and Islands. He served as principal of Highland Theological College for fifteen years and has also served as minister in various parishes of the Church of Scotland. Professor Mc Gowan is vice chairman of the World Reformed Fellowship and serves as chairman of its Theological Commission.