Não informado. Environmental Pollution and Control. U.S. Department of Commerce, National Technical Information Service.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Environmental Pollution and Control. Springfield, Va: U.S. Department of Commerce, National Technical Information Service.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Environmental Pollution and Control. U.S. Department of Commerce, National Technical Information Service.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.