Using Zotero, references can be inserted using either Microsoft Word, LibreOffice, Google Docs and Zoho Writer (NEW).
<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/9a32a93d-a872-4ae4-b7ab-9a00f754f71f/zotero_512x512x32.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/9a32a93d-a872-4ae4-b7ab-9a00f754f71f/zotero_512x512x32.png" width="40px" /> In my experience, using Zotero on Google Docs has often been buggy (for now).
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Inserting using all softwares look almost the same, however reference insertion in two softwares is covered here:
<aside> <img src="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/f8af40e6-ed56-4b57-bd50-8aaca9a85c24/zotero_512x512x32.png" alt="https://s3-us-west-2.amazonaws.com/secure.notion-static.com/f8af40e6-ed56-4b57-bd50-8aaca9a85c24/zotero_512x512x32.png" width="40px" /> Literally any identifier can be used to insert the references through Zotero. This could be any unique detail added to the library when the reference was added.
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For example (bolded identifiers are commonly used),
etc.