Ontario Industrial Waste Conference Toronto & Ontario. Ministry of the Environment. (1979). Proceedings of the twenty-sixth Ontario Industrial Waste Conference held at the Prince Hotel, Toronto, Ontario, June 17-20, 1979. Ontario Ministry of the Environment.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ontario Industrial Waste Conference Toronto و Ontario. Ministry of the Environment. Proceedings of the Twenty-sixth Ontario Industrial Waste Conference Held at the Prince Hotel, Toronto, Ontario, June 17-20, 1979. [Toronto]: Ontario Ministry of the Environment, 1979.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ontario Industrial Waste Conference Toronto و Ontario. Ministry of the Environment. Proceedings of the Twenty-sixth Ontario Industrial Waste Conference Held at the Prince Hotel, Toronto, Ontario, June 17-20, 1979. Ontario Ministry of the Environment, 1979.