DMU's new interactive guide to referencing is Cite them right online. It provides guidance on how to cite over 150 source types in a variety of referencing styles including Harvard, APA, IEEE, MHRA,Vancouver, OSCOLA and more.
If you are new to referencing, or could benefit from a refresher, work through the Cite them right eLearning tutorial. This interactive tutorial (each section take around 5 minutes to complete) will help you learn how to reference correctly and avoid plagiarism. The tutorial can be done whatever referencing style you are using.