Fatal+Familial+Insomnia+%28FFI%29
Here's your citation in American Psychological Association (APA) format:
Fatal+Familial+Insomnia+%28FFI%29. (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Fatal%2BFamilial%2BInsomnia%2B%2528FFI%2529