APA
Johns N., . (1991). Managing food hygiene. The Macmillan Press Ltd, London: .
Chicago
Johns Nicholas, . 1991. Managing food hygiene. The Macmillan Press Ltd, London: .
Harvard
Johns N., . (1991). Managing food hygiene. The Macmillan Press Ltd, London: .
MLA
Johns Nicholas, . Managing food hygiene. The Macmillan Press Ltd, London: . 1991.