Zotero has a plugin that can be used with both Microsoft Word. Using the plugin creates a link between your document and your Zotero library when you create in-text citations, which offers the following time-saving benefits:
To add an in-text citation .
Once you have at least one in-text citation in your document, you can ask Zotero to create a bibliography based on those citations.
If you have added your citations to Word using Zotero, you can quickly change the citation style.
There is also a plugin available for Google Drive. It uses the same menu format and commands as Microsoft Word. The browser plug in for Firefox and Chrome adds this functionality to Google Docs. According to Zotero's documentation a future update to the Safari plug in will make this work in that browser.
If you are not using the Zotero plug in for Google Docs or Microsoft Word, you can still create citations using your Zotero document data.
In these last two cases, you'll have the option to choose your citation style. Keep in mind that all of these options create static citations that are static: they cannot be updated the way you can with the Word or Google Docs plugin.