National Health Service. https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-c
Diakses pada 13 Januari 2021National Health Service. https://www.nhs.uk/conditions/vitamins-and-minerals/vitamin-b
Diakses pada 13 Januari 2021Nutrition Data. https://nutritiondata.self.com/facts/fruits-and-fruit-juices/1846/2
Diakses pada 13 Januari 2021