Gaya APA
L., K, , J., E., C, , W.
(1971).
Swine Production
(
4th. Ed.)
.
New York:
McGrawHill Book company INC..
Gaya MLA
L., Krider, , J.., E., Carroll, , W..
"Swine Production".
4th. Ed.
New York:
McGrawHill Book company INC.,
1971.
Text.