You can help students care about being transparent in their use. Discuss ChatGPT and create a policy for how (and whether) to use it.
Provide information to students on why it's important to give credit to the work of others. The University of Arizona's tutorial for students, entitled How Do I Give Credit to the Ideas of Others? may be of help.
See also Acknowledging and Citing Generative AI in Academic Work by Liza Long.
Guidelines for citing generative AI in
For guidelines on citing other formats of generative AI, see:
Here are some statements from academic publishers regarding the use of generative AI.
Other publishers are also coming out with statements like these.