I learned quite a bit looking into this.
I think the link to the source (which includes both the author's contact information and the license information) is sufficient in this case. However, below are some of the legal specifics I found...
As Daniel Beck mentioned in the question comments, the author of the work needs to specify the method of attribution if they are concerned with the format.
If the original author does not specify, (From the Creative Commons wiki...)
The proper method for giving credit will depend on the medium and
means you are using, and may be implemented in any reasonable manner
There is a Best Practices page that offers the following advice:
How do I properly attribute a Creative Commons licensed work?
All current CC licenses require that you attribute the original
author(s). If the copyright holder has not specified any particular
way to attribute them, this does not mean that you do not have to give
attribution. It simply means that you will have to give attribution to
the best of your ability with the information you do have. Generally
speaking, this implies five things:
- If the work itself contains any copyright notices placed there by the
copyright holder, you must leave those notices intact, or reproduce
them in a way that is reasonable to the medium in which you are
re-publishing the work.
- Cite the author's name, screen name, user
identification, etc. It is nice to link that name to the person's
profile page, if such a page exists.
- Cite the work's title or name, if
such a thing exists. It is nice to link the name or title directly to
the original work.
- Cite the specific CC license the work is under, and
link to the specific CC license, ie. for CC Attribution you would link
- If you are making a
derivative work or adaptation, in addition to the above, you need to
identify that your work is a derivative work i.e., “This is a Finnish
translation of the [original work] by [author].” or “Screenplay based
on [original work] by [author].”
In the case where a copyright holder
does choose to specify the manner of attribution, in addition to the
requirement of leaving intact existing copyright notices, they are
only able to require certain things. Namely:
- They may require that you attribute the work to a certain name,
pseudonym or even an organization of some sort.
- They may require you
to associate/provide a certain URL (web address) for the work.
The author of the photo in question stipulated the
Creative Commons Attribution-Share Alike 3.0 Unported license
From Section 4a:
You may Distribute or Publicly Perform the Work only under the terms
of this License. You must include a copy of, or the Uniform Resource
Identifier (URI) for, this License with every copy of the Work You
Distribute or Publicly Perform.
In any case, I think the question in question :) is properly attributed. To be perfectly honest, there is way more to this than I had imagined. Definitely some good things to keep in mind when posting on this site and others.