Não informado. (1950). Butter, cheese and milk products journal. Olsen Publishers.
Chicago-referens (17:e uppl.)Não informado. Butter, Cheese and Milk Products Journal. Milwaukee, Wis: Olsen Publishers, 1950.
MLA-referens (8:e uppl.)Não informado. Butter, Cheese and Milk Products Journal. Olsen Publishers, 1950.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.