Beck Scale For Suicidal Ideation (BSSI)
Here's your citation in American Psychological Association (APA) format:
Beck Scale For Suicidal Ideation (BSSI). (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Beck+Scale+For+Suicidal+Ideation+%28BSSI%29