Click in the spot in the document where the in-text citation should go.
Click on the Zotero tab at the top.
The Zotero menu will appear.
Click on Add/edit citation.
Choose your citation style and click OK.
Search your Zotero library by keyword in the box that appears.
Or click on the Zotero icon in the search box to switch to Classic View.
You can now browse your Zotero library.
Click on the correct item for your in-text citation and click OK.
The in-text citation, in proper format, is inserted into your Google document.