Não informado. (2004). Feed industry. Central Retail Feed Association.
Chicago-Zitierstil (17. Ausg.)Não informado. Feed Industry. Milwaukee, Wis: Central Retail Feed Association, 2004.
MLA-Zitierstil (8. Ausg.)Não informado. Feed Industry. Central Retail Feed Association, 2004.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.