Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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