Zotero can help you:
1. Go to Zotero.org and click download.
2. Download the program for your operating system AND the browser extension.
3. Open Zotero and the browser for which you installed the extension.
4. Click the Zotero icon to save a citation or web page. The icon will change depending on how many citations are listed on the website.
See the quick start guide for more information about using Zotero.
To insert a Zotero reference in Google Docs, use keyboard shortcuts: