649 Nurul Nadia Binti Ya'akob 2019-04-11 https://books.google.com.my/books?id=6jrlyOPfr24C&pg=PA68&dq=Amaranthus+cruentus+vitamin+A&hl=en&sa=X&ved=0ahUKEwjWnMWI3pveAhXEK48KHWIWD0EQ6AEIKTAA#v=onepage&q=Amaranthus%20cruentus%20vitamin%20A&f=false Grubben, G. J. H. (2004). Vegetables. Plant Resources of Tropical Africa (PROTA) 2. Revised record 5.9.2019.