| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Constitutions Compared: An Introduction to Comparative Constitutional Law | 978-90-5095-955-1 | 2009 | Aalt Willem Heringa |
| Constitutions Compared: An Introduction to Comparative Constitutional Law | 978-90-5095-688-8 | 2007 | " |
| Constitutions Compared: An Introduction to Comparative Constitutional Law (Third Edition) | 978-1-78068-078-1 | 2012 | " |
| Sources of Constitutional Law: Constitutions and Fundamental Legal Provisions from the United States, France, Germany, the Netherlands, the United Kingdom, the ECHR and the EU | 978-90-8952-090-6 | 2010 | |
| The National Parliaments in the EUropean Union - A Critical View on EU Constitution Building | 978-90-411-2452-4 | 2006 | |
P.K. · Philip Keefer · Philip Kiefer · Philip Kopper · Philipp Kiefer · Philippe Kieffer · Phillip Kopper
Europa Law Publishing · Intersentia · Intersentia Ltd · Wolters Kluwer