120 Nurul Nadia Binti Ya'akob 2019-04-17 https://books.google.com.my/books?id=r4bVBQAAQBAJ&pg=PA700&lpg=PA700&dq=opuntia+ficus+indica+vitamins+composition&source=bl&ots=9gRD9Usg8h&sig=ACfU3U0yYere6vx85cgrSEzDdTWSlmNSdA&hl=en&sa=X&ved=2ahUKEwjgy_S3_tXhAhUt4nMBHbq8CxgQ6AEwDnoECAgQAQ#v=onepage&q=opuntia%20ficus%20indica%20vitamins%20composition&f=false Simmonds, M. S. J., & Preedy, V. R. (2016). Nutritional composition of fruit cultivars. London, UK: Elsevier/AP, Academic Press is an imprint of Elsevier. Revised record 28.8.2019