Não informado. (1990). Danish Dairy and Food Industry Worldwide. Danish Dairy Engineers Association.
Chicago-referens (17:e uppl.)Não informado. Danish Dairy and Food Industry Worldwide. Odense, Dinamarca: Danish Dairy Engineers Association, 1990.
MLA-referens (8:e uppl.)Não informado. Danish Dairy and Food Industry Worldwide. Danish Dairy Engineers Association, 1990.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.