Silverhill Seeds and Books. Ziziphus zeyheriana. https://silverhillseeds.co.za/product/rhamnaceae-ziziphus-zeyheriana/?v=68caa8201064. Accessed 12/04/2021.
http://pza.sanbi.org/references/silverhill-seeds-and-books-ziziphus-zeyheriana-httpssilverhillseedscozaproductrhamnaceae