Abera, Bayeh, Gashaw Yitayew, and Hiwot Amare. “Salmonella SerotypeTyphi, Shigella, and Intestinal Parasites Among Food Handlers at Bahir Dar University, Ethiopia”. The Journal of Infection in Developing Countries 10, no. 02 (February 28, 2016): 121-126. Accessed December 11, 2019. https://jidc.org/index.php/journal/article/view/26927451.