Health CCM
https://health.ccm.net/faq/403-mental-block-symptoms-diagnosis-and-treatment
Diakses 12 Agustus 2020Health
https://www.health.com/mind-body/to-be-happy-let-go-of-these-4-things
Diakses 12 Agustus 2020Monday
https://monday.com/blog/productivity/5-helpful-tips-overcoming-mental-blocks
Diakses pada 12 Agustus 2020