These databases can find all types of articles and multi-modal resources. However, they are best at finding academic research articles. Do you need a scholarly or peer reviewed article? It's a good idea to begin here.
These are examples of multimodal information sources. There are many other types of multimodal information and writing. Please consult with your writing instructor about how to incorporate multimodals into your writing assignment.
The following is a selected list of policy institutes (think tanks) and organizations that focus on immigration-related topics.