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Diakses pada 16 desember 2020Medical News Today. https://www.medicalnewstoday.com/articles/324120
Diakses pada 16 desember 2020The Journal of Clinical Psychiatry. https://www.psychiatrist.com/JCP/article/Pages/l-theanine-relieves-positive-activation-anxiety-symptoms.aspx
Diakses pada 16 desember 2020