Myers-Briggs Type Indicator (MBTI)
Here's your citation in American Psychological Association (APA) format:
Myers-Briggs Type Indicator (MBTI). (n.d.). In Alleydog.com's online glossary. Retrieved from: https://www.alleydog.com/glossary/definition-cit.php?term=Myers-Briggs+Type+Indicator+%28MBTI%29