There are many citation styles. Different subject areas will have a particular citation style they use, and journals will often recommend a specific citation style. You can find guidance on the appropriate styles in the library Style Guides or in the Citation Style Research Guide.
If you are looking for tools to help you automatically create citations and a bibliography, look at using a citation manager such as Zotero. You an find guidance on using citation managers such as Zotero using the Citation Management Research Guide.
