"Pectins, Section 184.1588". US Food and Drug Administration, Code of Federal Regulations Title 21, Listing of Specific Substances Affirmed as GRAS. 7 November 1983. Archived from the original on May 10, 2003. Retrieved 22 October 2015.
mskcc.org
"Pectin". Memorial Sloan Kettering Cancer Center, New York. 31 July 2013. Retrieved 22 October 2015.
"Pectins, Section 184.1588". US Food and Drug Administration, Code of Federal Regulations Title 21, Listing of Specific Substances Affirmed as GRAS. 7 November 1983. Archived from the original on May 10, 2003. Retrieved 22 October 2015.