There are several citation formats used by mathematics researchers. Always check with your professor to make sure that you are using the correct style for your assignment.
Citation managers are great tools for keeping your research organized. You can use them to keep track of references you want to cite in your paper, share resources with your peers, and automatically generate citations for you. These tools can streamline your research process and save you a lot of time. However, make sure you double check any automatically generated citations for accuracy -- they can sometimes have minor errors.