Quite often when you are searching WorldCat to locate a book you will see that there are several editions listed for a book with the same title.
In order to request on interlibrary loan the edition of the book you're interested in, you'll need to take a look at the information about the various editions available.
Click on Edtions & Formats to look at the various editions available.
Scroll down the list and click on the edition of the book you're interested in.
To request on interlibrary loan this particular edition of the book, click on Request Item.