Students tend to search for information without paying attention to the source and not keeping track of the resources they have searched. This log does not only allow them to list out all the resources they use for a project, an essay or a presentation, but also let you know whether their resources are credible or grade-appropriate.
They can simply fill our the Type of Resource, Resource Information (Author, Publisher, Title & Date of Publication) and the page number (for books). As they hand in their assignment, you can use the log to make sure every student does their own research that provides them with meaningful quotations.
I use it for my research unit, and I definitely find my students more accountable and organized in their own research.