You can use Zotero to cite documents in multiple different ways.
With Zotero you can create a formatted bibliography in just a couple of clicks! Bibliographies generated using Zotero can be pasted anywhere. This could include, Microsoft Word documents, Google Docs, emails, blackboard discussions, and so on.
To create a bibliography select the reference(s) you wish to include. Then right click on the highlighted references. Click "generate bibliography from items" from the menu shown.
In the pop-up window select the citation style you wish you use, and select "Copy to Clipboard" from the list of output options.
Click "OK" and you are now ready to paste your bibliography wherever you wish!
See the video below from Georgia State University Libraries for how to use the Microsoft word plug-in for Zotero.
The word plug-in is good if you want Zotero to also generate your in-text citations.
Adding the Zotero plug-in to Word 2019 requires a manual install. Follow the directions in the link for how to manually install the Zotero plug-in to Word 2019.