Image links w/ Flickr

Hi – I’m building a site that will use a lot of photos, and have been storing the photos on Flickr. Up til now, I’ve been linking to the photo URLs, and all’s been well.
However, when the site goes live to the world, I will have to follow Flickr’s terms of use and link back to them.

Where does one insert the HTML to link to a photo?

thanks,
Laurie