Yes, I wanted to put something like 'Source: john doe at Dreamstime' or whatever under the image with 'john doe' and 'Dreamstime' linked to the relevant URLs.
From the advice you've given, and from searching through other blogs, I think my only option is to either put 'john doe's' link in the Post URL in the image
put the link in the main body of text like this - (Source) - and manipulate it so it appears under the image.
This seems a clunky way of going about image attribution. I'm new to blogging and am only just getting my head around the Creative Commons stuff. Am I being too compliant with the requirements for image attribution? Is this something everyone generally ignores?