Formatting of a style occurs within your word processor. The Zotero Library is a database of sources and does not display that information is a specific style.
Within your Microsoft Word, you select the specific style you want to use for your in-text citations and bibliography. If you used one style and need to change to a different one, you use the exact same process.
The default list is only a small portion of all of the styles available. Along with the major styles, there are styles for thousands of individual journals.
Illinois State University
Campus Box 8900
201 North School Street
Normal, Il 61790-8900