Παραπομπή APA

(1990). Green paper on the urban environment. Luxembourg: Office for Official Publications of the European Communities.

Παραπομπή Chicago Style

Green Paper On the Urban Environment. Luxembourg: Office for Official Publications of the European Communities, 1990.

Παραπομπή MLA

Green Paper On the Urban Environment. Luxembourg: Office for Official Publications of the European Communities, 1990.

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