Παραπομπή APA

(1990). Urban environment. Expert contributions. Luxembourg: Office for Official Publications of the European Communities.

Παραπομπή Chicago Style

Urban Environment. Expert Contributions. Luxembourg: Office for Official Publications of the European Communities, 1990.

Παραπομπή MLA

Urban Environment. Expert Contributions. Luxembourg: Office for Official Publications of the European Communities, 1990.

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