Não informado. (2014). Milk Industry International. National Dairymen's Association.
Lua i Stíl Chicago (17ú heag.)Não informado. Milk Industry International. London: National Dairymen's Association, 2014.
Lua MLA (8ú heag.)Não informado. Milk Industry International. National Dairymen's Association, 2014.
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