Todhunter, Rodger (August 1985). "Preservation, parks and the vice-royalty Lord Dufferin and Lord Grey in Canada". Landscape Planning. 12 (2): 141–160. doi:10.1016/0304-3924(85)90057-7.
"De Victor Hugo à lord Dufferin". Patrimoine: Historique de la Loi sur les biens culturels. Ministère de la Culture, des Communications et de la Condition féminine. Archived from the original on 3 March 2012. Retrieved 15 April 2012.
"Backgrounder". Signing of Memorandum of Understanding for Permanent Protection of Sahoyúé §ehdacho National Historic Site of Canada. Parks Canada. 11 March 2007. Archived from the original on 12 October 2013. Retrieved 11 October 2013.
"De Victor Hugo à lord Dufferin". Patrimoine: Historique de la Loi sur les biens culturels. Ministère de la Culture, des Communications et de la Condition féminine. Archived from the original on 3 March 2012. Retrieved 15 April 2012.
"Backgrounder". Signing of Memorandum of Understanding for Permanent Protection of Sahoyúé §ehdacho National Historic Site of Canada. Parks Canada. 11 March 2007. Archived from the original on 12 October 2013. Retrieved 11 October 2013.