(1989). European geothermal update: Proceedings of the Fourth International Seminar on the Results of EC Geothermal Energy Research and Demonstration, Florence, 27 - 30 April 1989. Kluwer.
Chicago-Zitierstil (17. Ausg.)European Geothermal Update: Proceedings of the Fourth International Seminar on the Results of EC Geothermal Energy Research and Demonstration, Florence, 27 - 30 April 1989. Dordrecht u.a: Kluwer, 1989.
MLA-Zitierstil (9. Ausg.)European Geothermal Update: Proceedings of the Fourth International Seminar on the Results of EC Geothermal Energy Research and Demonstration, Florence, 27 - 30 April 1989. Kluwer, 1989.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.