USDA, ARS, GRIN. 2017. Germplasm Resources Information Network [Internet]. Beltsville (MD): United States Department of Agriculture, Agricultural Research Service. Available at: http://www.ars-grin.gov/ 14 Ağustos 2009 tarihinde Wayback Machine sitesinde arşivlendi.. (Accessed: February 2017).
USDA, ARS, GRIN. 2017. Germplasm Resources Information Network [Internet]. Beltsville (MD): United States Department of Agriculture, Agricultural Research Service. Available at: http://www.ars-grin.gov/ 14 Ağustos 2009 tarihinde Wayback Machine sitesinde arşivlendi.. (Accessed: February 2017).