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Diakses pada 06 Agustus 2020Help Guide. https://www.helpguide.org/articles/addictions/how-to-quit-smoking.htm
Diakses pada 06 Agustus 2020Mayo Clinic. https://www.mayoclinic.org/diseases-conditions/high-blood-cholesterol/in-depth/reduce-cholesterol/art-20045935
Diakses pada 06 Agustus 2020