I took some photos recently that I've agreed to let a car club use in their national newsletter. This wasn't a pay shoot with a standard agreement, release, and invoice like I would normally do. I took some shots for myself that they liked and I'm going to donate them for an article. So I want to explicitly specify that the images I'm going to provide them can ONLY be used in this article this during this 1 edition for a single month. They can't go make prints of it, they can't put it on their website, they can't start selling posters on the side of the street, and they have no rights in perpetuity, just the 1 article for the 1 edition. Does anyone have any examples they can recommend of verbiage I should use for this? How formal does it need to be?