Social Service Work by Centennial College Libraries is licensed under a CC-BY-NC-SA 4.0 license unless otherwise stated.
Use Google Scholar to search Centennial College Library.
Canadian public policy organizations are a good source of information if you are looking for commentary on public policy.
Use the University of Saskatchewan's Canadian Public Policy Custom Search Engine to search over 200 public policy organization websites at once.
Keep in mind that the information you find through this search is grey literature and is not peer reviewed. Also keep in mind that some information you find may be biased, as many of these documents are making an argument and may not necessarily present both sides of an issue.