Citation

USDA 1997: United States Department of Agriculture, Agricultural Research Service, National Genetic Resources Program. Germplasm Resources Information Network (GRIN) [online database]. Tanacetum parthenium (L.) Sch. Bip. Beltsville (MD): National Germplasm Resources Laboratory. [Accessed 2008 August 12] Available from: http://www.ars-grin.gov/cgi-bin/npgs/html/tax_search.pl.