Healthline.
https://www.healthline.com/nutrition/spoiled-milk#what-it-is
Diakses pada 17 April 2020Live and Strong.
https://www.livestrong.com/article/505626-consequences-of-drinking-expired-milk/
Diakses pada 17 April 2020Well and Good.
https://www.wellandgood.com/good-food/spoiled-milk/
Diakses pada 17 April 2020