Παραπομπή APA
Bergstrom, R., & European Environment Agency. (1998). Land cover: Annual topic update 1997. Luxembourg: Office for Official Publications of the European Communities.
Παραπομπή Chicago StyleBergstrom, Rolf., and European Environment Agency. Land Cover: Annual Topic Update 1997. Luxembourg: Office for Official Publications of the European Communities, 1998.
Παραπομπή MLABergstrom, Rolf., and European Environment Agency. Land Cover: Annual Topic Update 1997. Luxembourg: Office for Official Publications of the European Communities, 1998.
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