Gaya APA
Young, J, Z.
(1981).
The Life of Vertebrates
(
Ed. 3)
.
London:
Clarendon Pess.
Gaya MLA
Young, J., Z..
"The Life of Vertebrates".
Ed. 3
London:
Clarendon Pess,
1981.
Buku PPS Pend. Biologi.