Using Zotero, you can create quick bibliographies or citations lists for when you only want a list of references; see Zotero's guide 'creating bibliographies.' If you want to create bibliographies and insert in-text citations as you write, Zotero's word processing plugins work with Microsoft Word, LibreOffice, and Google Docs.
In addition to Zotero's guides (above), you can watch a screencast on using Zotero with Microsoft Word below.