“Citing” can mean many things, and you can see a scramble as institutions try to develop guidelines for generated text and in there you might find MLA/APA recommendations.
I have spent a good amount of energy trying to look at how one might attribute AI generated imagery (do not expect anything authoritative) aiming for the Creative Commons elements of TASL- title, author, source, license when actually you rarely get 4 of these-- especially as the providers keep changing their terms and features.
Look at the approaches Creative Commons has done in attributing their use of AI generated imagery (I have been trying this) where it includes the platform, the prompt used, and some assertion of preferred sharing.
But it’s all fast moving, and frankly, for publishing now outside of my venues of blog posts and online writing, I might steer away from these images.
There is more than enough clearly open licensed media in services like Openverse– I can think the only case where AI images might be needed as to talk about AI as a topic.
That’s just my three cents. It’s moving too fast and wildly to find fixed rules.