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