Não informado. (1990). Danish Dairy and Food Industry Worldwide. Danish Dairy Engineers Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Danish Dairy and Food Industry Worldwide. Odense, Dinamarca: Danish Dairy Engineers Association, 1990.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Danish Dairy and Food Industry Worldwide. Danish Dairy Engineers Association, 1990.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.