Citazione APA

Johnson,R, & Johnson, R. (1981). Food safety Services. Regional Office for Europe, World Health Organization ; Available from WHO Publications Centre USA].

Stile di citazione Chicago

Johnson,R, e R. Johnson. Food Safety Services. Copenhagen : [Albany, N.Y.: Regional Office for Europe, World Health Organization ; Available from WHO Publications Centre USA], 1981.

Citazione MLA

Johnson,R, e R. Johnson. Food Safety Services. Regional Office for Europe, World Health Organization ; Available from WHO Publications Centre USA], 1981.