Gaya APA
Siregar,asmaun, . (1991).
The Indonesian journal of Veterinary science,vol.74 no.2 july 1991 .
Jakarta:
The Indonesian Veterinary association.
Gaya MLA
Siregar,asmaun, .
"The Indonesian journal of Veterinary science,vol.74 no.2 july 1991".
Jakarta:
The Indonesian Veterinary association,
1991.
Text.