Grattan, D. W., & Marcil, S. (1993). Saving the twentieth century: The conservation of modern materials ; proceedings of a conference ; symposium '91 - Saving the twentieth century, Ottawa, Canada 15 to 20 september 1991 / organized by the Canadian Conservation Institute, Communications Canada. Ed. by David W. Grattan (1.). Canadian Conservation Inst..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Grattan, David W., و Sylvie Marcil. Saving the Twentieth Century: The Conservation of Modern Materials ; Proceedings of a Conference ; Symposium '91 - Saving the Twentieth Century, Ottawa, Canada 15 to 20 September 1991 / Organized by the Canadian Conservation Institute, Communications Canada. Ed. by David W. Grattan. 1. Ottawa: Canadian Conservation Inst., 1993.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Grattan, David W., و Sylvie Marcil. Saving the Twentieth Century: The Conservation of Modern Materials ; Proceedings of a Conference ; Symposium '91 - Saving the Twentieth Century, Ottawa, Canada 15 to 20 September 1991 / Organized by the Canadian Conservation Institute, Communications Canada. Ed. by David W. Grattan. 1. Canadian Conservation Inst., 1993.