To create a bibliography, select the titles of the articles that you used in your research paper. To select multiple articles, use ctrl+click (Windows) or cmd+click (Mac). Right click on your selection and choose "Create bibliography from item(s)."
Select your bibliography style and the file type you would like to export your bibliography in. Save the file to your computer and open it the word processor of your choice! Although not discussed here, Zotero also provides plugins for Word and LibreOffice.
Triple check that the information in your bibliography is accurate! Zotero will give you a good starting point, but they may not be completely accurate. The Purdue Online Writing Lab is a good place for more information about proper citations.
If the citation style you need is not listed, there are hundreds of other styles that can be added. From the Preferences menu, select "Cite." Then select "Get additional styles." Search for the style you need then select its title to install it.