14 Thik Sukree 2016-07-13 https://ndb.nal.usda.gov/ndb/foods/show/3167?manu=&fgcd= United States Department of Agriculture (2018). Basic Report: 11457, Spinach, raw. Retrieved from https://ndb.nal.usda.gov/ndb/foods/show/3167?manu=&fgcd= Revised record 27.8.2019