Values of Christian Democracy : a compendium of essential building blocks / by Norbert Neuhaus and Horst Langes. - Neuhaus, Nerbert. (OLS)http://pul/name/88332; Langes, Horst. (OLS)http://pul/name/88333 (Wydawnictwo "Wokol nas", 2003)
Sulla cop.: Robert Schuman Foundation. European documentation.
Bibliografia in nota.