Não informado. (1988). Plant Varieties & Seeds. National Institute of Agriculture.
Cita Chicago Style (17a ed.)Não informado. Plant Varieties & Seeds. Cambridge, Inglaterra: National Institute of Agriculture, 1988.
Cita MLA (8a ed.)Não informado. Plant Varieties & Seeds. National Institute of Agriculture, 1988.
Precaución: Estas citas no son 100% exactas.