Ontario Industrial Waste Conference Toronto & Ontario. Ministry of the Environment. (1980). Proceedings of the Twenty-Seventh Ontario Industrial Waste Conference held at the Prince Hotel, Toronto, Ontario, June 15-18, 1980. Ontario Ministry of the Environment.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিOntario Industrial Waste Conference Toronto এবং Ontario. Ministry of the Environment. Proceedings of the Twenty-Seventh Ontario Industrial Waste Conference Held at the Prince Hotel, Toronto, Ontario, June 15-18, 1980. Toronto: Ontario Ministry of the Environment, 1980.
M.L.A (8 ম সংস্করণ) উদ্ধৃতিOntario Industrial Waste Conference Toronto এবং Ontario. Ministry of the Environment. Proceedings of the Twenty-Seventh Ontario Industrial Waste Conference Held at the Prince Hotel, Toronto, Ontario, June 15-18, 1980. Ontario Ministry of the Environment, 1980.