Gaya APA
Williamson, G. (1978).
An introduction to : animal husbandry in the tropics (3).
London:
The English Langnuage Book Society Longmants.
Gaya MLA
Williamson, G.
"An introduction to : animal husbandry in the tropics".
3
London:
The English Langnuage Book Society Longmants,
1978.
Text.