NCBI. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1349925/pdf/amjph00228-0032.pdf
Diakses pada 21 Juli 2020WebMD. https://www.webmd.com/smoking-cessation/news/20000523/extra-vitamin-c-no-benefit-to-smokers#1
Diakses pada 21 Juli 2020Nutrition Information Center, University of Stellenbosch. https://www.sun.ac.za/english/faculty/healthsciences/nicus/Documents/Files/Files/Fact_sheets/Vit%20C%20and%20Smoking.pdf
Diakses pada 21 Juli 2020CDC. https://www.cdc.gov/tobacco/data_statistics/fact_sheets/health_effects/effects_cig_smoking/index.htm
Diakses pada 21 Juli 2020NIH. https://ods.od.nih.gov/factsheets/VitaminC-HealthProfessional/
Diakses pada 21 Juli 2020Very Well Mind. https://www.verywellmind.com/smoking-and-vitamin-depletion-2825319
Diakses pada 21 Juli 2020WebMD. https://www.webmd.com/diet/supplement-guide-vitamin-e#1
Diakses pada 21 Juli 2020Medical News Today. https://www.medicalnewstoday.com/articles/252758#carotene_foods
Diakses pada 21 Juli 2020Mayo Clinic. https://www.mayoclinic.org/drugs-supplements/beta-carotene-oral-route/proper-use/drg-20066795
Diakses pada 21 Juli 2020Cleveland Clinic. https://my.clevelandclinic.org/health/articles/17488-smoking
Diakses pada 24 Juli 2020Healthline. https://www.healthline.com/nutrition/vitamin-c-benefits#3.-May-lower-your-risk-of-heart-disease
Diakses pada 24 Juli 2020Harvard Health Publishing, Harvard Medical School. https://www.health.harvard.edu/staying-healthy/whats-the-right-amount-of-vitamin-c-for-me
Diakses pada 24 Juli 2020WebMD. https://www.webmd.com/lung/copd/news/20100517/vitamin-e-may-lower-womens-lung-disease-risk
Diakses pada 24 Juli 2020Frontiers Oncology Journal. https://www.frontiersin.org/articles/10.3389/fonc.2017.00023/full#B54
Diakses pada 24 Juli 2020