Lues, Jan F. R.; Rasephei, M. R.; Venter, P.; Theron, M. M. (2006). «Assessing Food Safety and Associated Food Handling Practices in Street Food Vending» (στα αγγλικά). International Journal of Environmental Health Research16 (5): 319–328. doi:10.1080/09603120600869141. PMID16990173.
Lues, Jan F. R.; Rasephei, M. R.; Venter, P.; Theron, M. M. (2006). «Assessing Food Safety and Associated Food Handling Practices in Street Food Vending» (στα αγγλικά). International Journal of Environmental Health Research16 (5): 319–328. doi:10.1080/09603120600869141. PMID16990173.