Get the display name of a value in person of group field from SharePoint 2013 "_api/web/lists" service

Let’s assume that we need to access a SharePoint list using built in web services. To do the task we can use a service like below.

http://sp13/sites/dev/_api/web/lists/getbytitle('Regions')/items 

What happen if we have a “Person or Group” column in the list? We would get a result like below.



As you can see we get only the User Id instead of other properties like login name or display name.
To get those properties, we just need to expand respective properties as shown below.

http://sp13/sites/dev/_api/web/lists/getbytitle('Regions')/items?$select=Area_x0020_General_x0020_Manager/Name,Area_x0020_General_x0020_Manager/Title&$expand=Area_x0020_General_x0020_Manager/Id

Following is the result I got, which is what I expected