M. Alhamando, et.al, M. “Anti Bacterial Activity of Cinnamomum Zeylanicum and Capsicum Annunm Extracts Against Escherichia Coli and Salmonella Typhi .”. Al-Qadisiyah Journal of Pure Science, Vol. 20, no. 1, July 2017, pp. 50-57, https://journalsc.qu.edu.iq/index.php/JOPS/article/view/81.