Não informado. (2002). Report of the Breeding and Production Organisation. Milk Marketing Board.
Chicago-viite (17. p.)Não informado. Report of the Breeding and Production Organisation. Thames Ditton, Inglaterra: Milk Marketing Board, 2002.
MLA-viite (8. p.)Não informado. Report of the Breeding and Production Organisation. Milk Marketing Board, 2002.
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