Approximately 30 percent of books or book chapters can be found by using Crossref direct import. 

Make sure the author's name is correct

Change the Publication Date dropdown to Title and fill in the beginning of the title

Click on Search Crossref

If Crossref has results, you will see a screen that looks like this

If you click on the title, you will see more information that can help you verify if the information is correct

If you find the correct record, click the check box on the right and then Continue

Review and Finish Import

Look at the individual record for Crossref imports to make sure it is accurate.  Crossref often leaves off information.

• check contribution type
• add city and state if necessary
• add country if necessary
• add edition information if 2nd edition or higher
• make sure author's names are in the right order
• add editor's names if necessary

If there is no match in CrossRef, you will have to manually enter the information or use BibTex imports from another source.