Healthline. https://www.healthline.com/health/mental-health/middle-child-syndrome#is-it-real
Diakses pada 15 Februari 2021Parenting First Cry. https://parenting.firstcry.com/articles/middle-child-syndrome-signs-and-tips-to-prevent-it/
Diakses pada 15 Februari 2021Psychology Today. https://www.psychologytoday.com/us/blog/how-raise-happy-cooperative-child/202008/middle-child-syndrome
Diakses pada 15 Februari 2021