Παραπομπή σε μορφή APA (7η εκδ.)

European Commission. (2001). Sustainable tourism and Natura 2000: Guidelines, initiatives and good practices in Europe. Office for Official Publications of the European Communities.

Παραπομπή σε μορφή Chicago (17η εκδ.)

European Commission. Sustainable Tourism and Natura 2000: Guidelines, Initiatives and Good Practices in Europe. Luxembourg: Office for Official Publications of the European Communities, 2001.

Παραπομπή σε μορφή MLA (8th εκδ.)

European Commission. Sustainable Tourism and Natura 2000: Guidelines, Initiatives and Good Practices in Europe. Office for Official Publications of the European Communities, 2001.