Παραπομπή APA

(1993). EC study guide to environment-related courses. Luxembourg: Office for Official Publications of the European Communities.

Παραπομπή Chicago Style

EC Study Guide to Environment-related Courses. Luxembourg: Office for Official Publications of the European Communities, 1993.

Παραπομπή MLA

EC Study Guide to Environment-related Courses. Luxembourg: Office for Official Publications of the European Communities, 1993.

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