On Kuyper A Collection of Readings on the Life, Work & Legacy of Abraham Kuyper Bishop Steve Heftet / 2013 / Engelsk
Reformed Epistemology The relation of Logos and Ratio in the history of Western epistemology Vollenhoven, Dirk D.H. Heftet / 2013 / Engelsk
Vollenhoven's Problem-Historical Method Introduction and Explorations Bril, Kornelis A. Heftet / 2005 / Engelsk
