Dyfyniad APA

Hobbs, B. C. (1987). Food poisoning and food hygiene (5th ed.). E. Arnold.

Dyfyniad Arddull Chicago

Hobbs, Betty Constance. Food Poisoning and Food Hygiene. 5th ed. London: E. Arnold, 1987.

Dyfyniad MLA

Hobbs, Betty Constance. Food Poisoning and Food Hygiene. 5th ed. E. Arnold, 1987.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.