Não informado. (1920). Milk Industry. National Dairymen's Association.
Chicago-Zitierstil (17. Ausg.)Não informado. Milk Industry. London: National Dairymen's Association, 1920.
MLA-Zitierstil (8. Ausg.)Não informado. Milk Industry. National Dairymen's Association, 1920.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.