What are the health benefits of soy?, Dietitians of Canada. (September 2010). http://www.dietitians.ca. Retrieved November 8, 2010.
uspto.gov
patft.uspto.gov
Doris E. Pitz. Lactose-Free Synthetic Ice Cream. United States Patent No: 2,643,90, February 17, 1987. http://patft.uspto.govDiarsipkan 2012-10-19 di Wayback Machine.. Retrieved November 8, 2011.
web.archive.org
Doris E. Pitz. Lactose-Free Synthetic Ice Cream. United States Patent No: 2,643,90, February 17, 1987. http://patft.uspto.govDiarsipkan 2012-10-19 di Wayback Machine.. Retrieved November 8, 2011.