Healthline. https://www.healthline.com/health/smoking-tea
Diakses pada 20 Juli 2020Science Daily. https://www.sciencedaily.com/releases/2010/01/100112165108.htm
Diakses pada 20 Juli 2020Taylor & Francis Online. https://www.tandfonline.com/doi/abs/10.1179/1476830513Y.0000000079
Diakses pada 20 Juli 2020