If you have advanced, you can use the data viewer with getastext ( yourContainerfield ) to see the contents. If you see just the file name, it's not been inserted as a reference. If by reference, you'll see multiple lines of text--including the file path.
You can also put the name of your container field into the specify calculation dialog of a new calculation field and specify text as the return type. You can then put this field on your layout to inspect your container fields to see how they were inserted.
Thank you Phil