Toh, P.S., A. Birchenough, T. Smalley. "Risk Assessment: Foodhandling Practices and food-contact surfaces of hawkers in Malaysia." International Journal of Environmental Health Research 10/3 (2000): 191-201.

Toh, P.S., A. Birchenough, T. Smalley. "Risk Assessment: Foodhandling Practices and food-contact surfaces of hawkers in Malaysia." International Journal of Environmental Health Research 10/3 (2000): 191-201.