When the author takes an idea from another author, a citation is required—even if the author then develops the idea further. This might be an idea about how to interpret the data, either what methodology to use or what conclusion to draw. It might be an idea about broad developments in a field or general information. Regardless of the idea, authors should cite their sources. In cases where the author develops the idea further, it is still necessary to cite the original source of the idea, and then in a subsequent sentence the author can explain her or his more developed idea.