APA (7th ed.) Citation

Hobbs, B. C., & Roberts, D. (1993). Food poisoning and food hygiene (6th ed.). Edward Arnold.

Chicago Style (17th ed.) Citation

Hobbs, Betty Constance, and Diane Roberts. Food Poisoning and Food Hygiene. 6th ed. London: Edward Arnold, 1993.

MLA (9th ed.) Citation

Hobbs, Betty Constance, and Diane Roberts. Food Poisoning and Food Hygiene. 6th ed. Edward Arnold, 1993.