(2004). Sustainable tourism development in European protected areas: Networking Meeting of the European Charter Parks, 15. - 18.3.2003, Vilm, Germany. BfN.
Chicago-Zitierstil (17. Ausg.)Sustainable Tourism Development in European Protected Areas: Networking Meeting of the European Charter Parks, 15. - 18.3.2003, Vilm, Germany. Bonn: BfN, 2004.
MLA-Zitierstil (9. Ausg.)Sustainable Tourism Development in European Protected Areas: Networking Meeting of the European Charter Parks, 15. - 18.3.2003, Vilm, Germany. BfN, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.