Cleveland Clinic. https://my.clevelandclinic.org/health/articles/14568-oral-iron-supplementation
Diakses pada 2 Oktober 2019Healthline. https://www.healthline.com/health/10-reasons-iron-supplements#the-takeaway
Diakses pada 2 Oktober 2019Healthline. https://www.healthline.com/health/how-to-increase-red-blood-cells#supplements-to-try
Diakses pada 2 Oktober 2019Medical News Today. https://www.medicalnewstoday.com/articles/321530.php
Diakses pada 2 Oktober 2019