Environmental Research Projects in the European Communities & Commission of the European Communities. (1980). Directory of solid waste and chemical waste. Peregrinus for the Commission of the European Communities.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Environmental Research Projects in the European Communities و Commission of the European Communities. Directory of Solid Waste and Chemical Waste. Hitchin: Peregrinus for the Commission of the European Communities, 1980.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Environmental Research Projects in the European Communities و Commission of the European Communities. Directory of Solid Waste and Chemical Waste. Peregrinus for the Commission of the European Communities, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.