Sometimes, such as with a print source, you may want to manually add items to your Zotero library. To do this, click on the + icon in Zotero and select the type of material you are adding.
![](https://libapps.s3.amazonaws.com/accounts/143761/images/z_manual_add.png)
Or if you know the unique identifying number of your item, such as ISBN or DOI, click on the icon just to the right of the + sign.
![](https://libapps.s3.amazonaws.com/accounts/143761/images/z_add_by_number.png)