Document Type : Full Research Paper
(2006). The effect of vitamin supplements on laying hens performance. Veterinary Research & Biological Products, 19(4), 162-167.
. "The effect of vitamin supplements on laying hens performance", Veterinary Research & Biological Products, 19, 4, 2006, 162-167.
(2006). 'The effect of vitamin supplements on laying hens performance', Veterinary Research & Biological Products, 19(4), pp. 162-167.
, "The effect of vitamin supplements on laying hens performance," Veterinary Research & Biological Products, 19 4 (2006): 162-167,
The effect of vitamin supplements on laying hens performance. Veterinary Research & Biological Products, 2006; 19(4): 162-167.
)