Παραπομπή σε μορφή APA (7η εκδ.)

European Environment Agency. (2008). Effectiveness of environmental taxes and charges for managing sand, gravel and rock extraction in selected EU countries. Office for Official Publications of the European Communities.

Παραπομπή σε μορφή Chicago (17η εκδ.)

European Environment Agency. Effectiveness of Environmental Taxes and Charges for Managing Sand, Gravel and Rock Extraction in Selected EU Countries. Luxembourg: Office for Official Publications of the European Communities, 2008.

Παραπομπή σε μορφή MLA (8th εκδ.)

European Environment Agency. Effectiveness of Environmental Taxes and Charges for Managing Sand, Gravel and Rock Extraction in Selected EU Countries. Office for Official Publications of the European Communities, 2008.