Various tools are available for citation management such as Mendeley, EndNote, and RefWorks. While some of these are available free of cost, others are paid versions. Moreover, each of the tools have different specifications. For instance, with Mendeley, you can cite while writing your document, while EndNote is useful to download resources from the different databases you might be using. You will need to choose from the available tools based on your requirements. A good idea would be to explore the free tools to know what they offer. You can also talk to your colleagues or seniors to know which tools they frequently use.