Gaya APA
HALLE, I. et al (2011).
Influence of vitamin B12 and Cobalt on growth of boiler chickens and Pekin ducks .
Hamburg-Germany:
vTI.
Gaya MLA
HALLE, Ingrid. et al.
"Influence of vitamin B12 and Cobalt on growth of boiler chickens and Pekin ducks".
Hamburg-Germany:
vTI,
2011.
Artikel.